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jotalcalvo

Jose Calvo

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193 Images, vektory, záběry a zvukové soubory bezplatných poplatků

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False colour transmission electron microscope (TEM) micrograph showing the cytoplasm of a protein-synthetizing cell packed with parallel cisterns of rough endoplasmic reticulum. The lumen of cisternae is labelled in blue colour and the cytoplasm, full of ribosomes, is labelled in green color.
False colour transmission electron microscope (TEM) micrograph showing the cytoplasm of a protein-synthetizing cell packed with parallel cisterns of rough endoplasmic reticulum. The lumen of cisternae is labelled in blue colour and the cytoplasm, full of ribosomes, is labelled in green color.PREMIUM
Polyploid hepatocytes. Several hepatocytes show very large nucleus. These cells are polyploid, with 4, 8, 16 or more times the haploid chromosome complement.  The hepatocytes contain abundant granules of bile pigment.
Polyploid hepatocytes. Several hepatocytes show very large nucleus. These cells are polyploid, with 4, 8, 16 or more times the haploid chromosome complement. The hepatocytes contain abundant granules of bile pigment.PREMIUM
Muscular artery, vein and nerve bundles surrounded by adipose tissue. The artery is identified as having a thicker wall and a smaller diameter than the vein. Light microscope micrograph. Hematoxylin & eosin stain Reklamní fotografie
Muscular artery, vein and nerve bundles surrounded by adipose tissue. The artery is identified as having a thicker wall and a smaller diameter than the vein. Light microscope micrograph. Hematoxylin & eosin stainPREMIUM
Mikroskop falešného transmisního elektronového mikroskopu (TEM) zobrazující mitochondrie (zelená), lysosomy (tmavě růžová), glykogen (modrá), drsné endoplazmatické retikulum (červená) a centriol (světle modrá).
Mikroskop falešného transmisního elektronového mikroskopu (TEM) zobrazující mitochondrie (zelená), lysosomy (tmavě růžová), glykogen (modrá), drsné endoplazmatické retikulum (červená) a centriol (světle modrá).PREMIUM
Silver stained cross section of spinal cord.
Silver stained cross section of spinal cord.PREMIUM
Jádra buněk hladkého svalstva. Tyto buňky vykazují velmi protáhlé fusiformní jádro, které obsahuje malá jádra. Malé řezy na povrchu jádra jsou způsobeny kontrakcí vlákna hladkého svalstva.
Jádra buněk hladkého svalstva. Tyto buňky vykazují velmi protáhlé fusiformní jádro, které obsahuje malá jádra. Malé řezy na povrchu jádra jsou způsobeny kontrakcí vlákna hladkého svalstva.PREMIUM
False colour transmission electron microscope (TEM) micrograph showing mitochondria (blue), glycogen (pink), rough endoplasmic reticulum (red) in the cytoplasm of a hepatocyte. Reklamní fotografie
False colour transmission electron microscope (TEM) micrograph showing mitochondria (blue), glycogen (pink), rough endoplasmic reticulum (red) in the cytoplasm of a hepatocyte.PREMIUM
False colour transmission electron microscope (TEM) micrograph showing the sex vesicle (paired sex chromosomes in a spermatocyte) (dark blue). Nucleus is brown, nucleolus light blue, nuclear envelope (red).
False colour transmission electron microscope (TEM) micrograph showing the sex vesicle (paired sex chromosomes in a spermatocyte) (dark blue). Nucleus is brown, nucleolus light blue, nuclear envelope (red).PREMIUM
Human endometrium. Proliferative phase. Several tubular endometrial glands are cross sectioned showing their simple columnar epithelium. Among them, the uterine stroma shows many cells and blood vessels. Reklamní fotografie
Human endometrium. Proliferative phase. Several tubular endometrial glands are cross sectioned showing their simple columnar epithelium. Among them, the uterine stroma shows many cells and blood vessels.PREMIUM
Malý adipocytový lalok umístěný v pojivové tkáni. Malý nerv je umístěn v pravém horním rohu. Světelný mikrofotografie. H&E skvrna.
Malý adipocytový lalok umístěný v pojivové tkáni. Malý nerv je umístěn v pravém horním rohu. Světelný mikrofotografie. H&E skvrna.PREMIUM
Light micrograph of goblet cells stained with the PAS technique. They are located in the epithelium lining the villi of the small intestine. The striated border of enterocytes is also stained with the PAS technique.
Light micrograph of goblet cells stained with the PAS technique. They are located in the epithelium lining the villi of the small intestine. The striated border of enterocytes is also stained with the PAS technique.PREMIUM
Epiteliální výstelka semenného tubulu krysích varlat. Na lumenovém tubulu jsou identifikovány ocasy spermií. Hluboko do epitelu lze v spermatocytech (tmavá jádra) pozorovat meiotické fáze. Reklamní fotografie
Epiteliální výstelka semenného tubulu krysích varlat. Na lumenovém tubulu jsou identifikovány ocasy spermií. Hluboko do epitelu lze v spermatocytech (tmavá jádra) pozorovat meiotické fáze.PREMIUM
Tuberculosis granuloma with a central necrosis (caseous necrosis) and multinucleated Langhans cell.
Tuberculosis granuloma with a central necrosis (caseous necrosis) and multinucleated Langhans cell.PREMIUM
Light microscopy micrograph showing white (bottom) and brown (top) fat. The larger holes correspond to white adipocytes, while brown adipocytes shows a spongy aspect because they stored fat as small lipid droplets. Reklamní fotografie
Light microscopy micrograph showing white (bottom) and brown (top) fat. The larger holes correspond to white adipocytes, while brown adipocytes shows a spongy aspect because they stored fat as small lipid droplets.PREMIUM
Mikrograf transmisního elektronového mikroskopu (TEM) ukazující několik organel (mitochondrie, lysosomy, glykogen, RER) v cytoplazmě hepatocytů. Reklamní fotografie
Mikrograf transmisního elektronového mikroskopu (TEM) ukazující několik organel (mitochondrie, lysosomy, glykogen, RER) v cytoplazmě hepatocytů.PREMIUM
A mutinucleated giant cell derived from osteoclasts. Biopsy of a human giant cell tumour of bone. Light micrograph.
A mutinucleated giant cell derived from osteoclasts. Biopsy of a human giant cell tumour of bone. Light micrograph.PREMIUM
Dendritic tree of a Purkinje neuron stained with the silver Golgi method. The dendrite surface is full of small dendritic spines. Reklamní fotografie
Dendritic tree of a Purkinje neuron stained with the silver Golgi method. The dendrite surface is full of small dendritic spines.PREMIUM
Bukální nátěr zobrazující dlaždicové epiteliální buňky exfoliované z ústní sliznice. Malé modré tečky umístěné hlavně na pravé buňce jsou bakterie.
Bukální nátěr zobrazující dlaždicové epiteliální buňky exfoliované z ústní sliznice. Malé modré tečky umístěné hlavně na pravé buňce jsou bakterie.PREMIUM
Light micrograph of a human liver stained with hematoxylin and eosin. The hepatocytes are arranged in cords separated by clear areas where hepatic sinusoids showing red blood cells are located.
Light micrograph of a human liver stained with hematoxylin and eosin. The hepatocytes are arranged in cords separated by clear areas where hepatic sinusoids showing red blood cells are located.PREMIUM
Taste buds in foliate tongue papillae. Many of them show the taste or gustatory pore. Hematoxylin & eosin stain.
Taste buds in foliate tongue papillae. Many of them show the taste or gustatory pore. Hematoxylin & eosin stain.PREMIUM
Seminiferous tubules of human testis. Male germinal epithelium shows spermatogonia, spermatocytes in meiosis, spermatids, and spermatozoa with tails protruding into the lumen. Light microscope micrograph. Hematoxylin & eosin stain.
Seminiferous tubules of human testis. Male germinal epithelium shows spermatogonia, spermatocytes in meiosis, spermatids, and spermatozoa with tails protruding into the lumen. Light microscope micrograph. Hematoxylin & eosin stain.PREMIUM
Erythroblastosis fetalis. Presence of erythroblast (nucleated red blood cells) in the fetal blood in a case of Rh incompatibility.
Erythroblastosis fetalis. Presence of erythroblast (nucleated red blood cells) in the fetal blood in a case of Rh incompatibility.PREMIUM
Mikrograf falešného transmisního elektronového mikroskopu (TEM) B-lymfocytů na počátku jeho aktivace. RER cisterny (červené) se začínají objevovat v cytoplazmě plné ribozomů. Reklamní fotografie
Mikrograf falešného transmisního elektronového mikroskopu (TEM) B-lymfocytů na počátku jeho aktivace. RER cisterny (červené) se začínají objevovat v cytoplazmě plné ribozomů.PREMIUM
Spermatogenesis. Male germinal epithelium showing spermatogonia, spermatocytes in meiosis (pachytena), spermatids, and spermatozoa with their tails protruding into the lumen.  Reklamní fotografie
Spermatogenesis. Male germinal epithelium showing spermatogonia, spermatocytes in meiosis (pachytena), spermatids, and spermatozoa with their tails protruding into the lumen. PREMIUM
Brown adipocytes stained with hematoxylin & eosin. They contain many small lipid droplets distributed throughout the cytoplasm, thus acquiring a spongy appearance.
Brown adipocytes stained with hematoxylin & eosin. They contain many small lipid droplets distributed throughout the cytoplasm, thus acquiring a spongy appearance.PREMIUM
Světelný mikrofotografie průřezu svalové tepny, zobrazující silnou a zvlněnou vnitřní elastickou vrstvu, střední vrstvu s vlákny hladkého svalstva a vnější pojivovou tkáň. Skvrna na hematoxylin a eosin
Světelný mikrofotografie průřezu svalové tepny, zobrazující silnou a zvlněnou vnitřní elastickou vrstvu, střední vrstvu s vlákny hladkého svalstva a vnější pojivovou tkáň. Skvrna na hematoxylin a eosinPREMIUM
Simple columnar epithelium of the small intestine. The apical surface shows a well developed brush border. In the center, the "cup" of three goblet cell are seen. Light microscope micrograph. H&E stain.
Simple columnar epithelium of the small intestine. The apical surface shows a well developed brush border. In the center, the "cup" of three goblet cell are seen. Light microscope micrograph. H&E stain.PREMIUM
False colour transmission electron microscope (TEM) micrograph of an oogonium showing the nucleus (green), the nuclear envelope (pink) and an atypical nucleolus (dark blue). In the cytoplasm (light blue), there are mitochondria (red) and lipid droplets (yellow). Reklamní fotografie
False colour transmission electron microscope (TEM) micrograph of an oogonium showing the nucleus (green), the nuclear envelope (pink) and an atypical nucleolus (dark blue). In the cytoplasm (light blue), there are mitochondria (red) and lipid droplets (yellow).PREMIUM
False colour transmission electron microscope (TEM) micrograph of a neuron cell body showing mitochondria (pink), lysosomes (green), microtubules (red), RER (yellow) and Golgi (light green).
False colour transmission electron microscope (TEM) micrograph of a neuron cell body showing mitochondria (pink), lysosomes (green), microtubules (red), RER (yellow) and Golgi (light green).PREMIUM
Blood smear showing, in the center, three neutrophil with hypersegmented nucleus. These cells appear in pathological situations such as megaloblastic anemias. Wright stain.
Blood smear showing, in the center, three neutrophil with hypersegmented nucleus. These cells appear in pathological situations such as megaloblastic anemias. Wright stain.PREMIUM
Light micrograph cross section of rat kidney stained with hematoxylin and eosin displaying the peripheral renal cortex (with many glomeruli) and, in the central medulla, a Malpighian pyramid leading to a renal calyx.
Light micrograph cross section of rat kidney stained with hematoxylin and eosin displaying the peripheral renal cortex (with many glomeruli) and, in the central medulla, a Malpighian pyramid leading to a renal calyx.PREMIUM
Tangential section of the germinal epithelium of a seminiferous tubule. The Sertoli cells can be identified by their large nucleolus (top and bottom). In the centre, the nuclei with chromatin in thick threads are spermatocytes I in pachytena phase of the meiosis.
Tangential section of the germinal epithelium of a seminiferous tubule. The Sertoli cells can be identified by their large nucleolus (top and bottom). In the centre, the nuclei with chromatin in thick threads are spermatocytes I in pachytena phase of the meiosis.PREMIUM
Blood smear.  Chronic myelogenous or granulocytic leukemia.  Abundant immature myeloid cells. Wright stain.
Blood smear. Chronic myelogenous or granulocytic leukemia. Abundant immature myeloid cells. Wright stain.PREMIUM
Pseudostratified columnar epithelium of the epididymis. The epithelial cells show stereocilia in the apical surface.
Pseudostratified columnar epithelium of the epididymis. The epithelial cells show stereocilia in the apical surface.PREMIUM
A septum of connective tissue, with numerous adipocytes (fat cells) which contain a large lipid droplet. The sinuous structures correspond to nerves. Light micrograph. Hematoxylin & eosin stain
A septum of connective tissue, with numerous adipocytes (fat cells) which contain a large lipid droplet. The sinuous structures correspond to nerves. Light micrograph. Hematoxylin & eosin stainPREMIUM
Epiphysis of a developing long bone. A growth plate is located between the primary (down) and secondary (up) ossification centres. Reklamní fotografie
Epiphysis of a developing long bone. A growth plate is located between the primary (down) and secondary (up) ossification centres.PREMIUM
The interstitial or Leydig cells secrete testosterone, the male sex hormone. They are polyhedral epithelioid cells with a single round nucleus and an acidophilic cytoplasm which contains pigment granules and lipid droplets.
The interstitial or Leydig cells secrete testosterone, the male sex hormone. They are polyhedral epithelioid cells with a single round nucleus and an acidophilic cytoplasm which contains pigment granules and lipid droplets.PREMIUM
Bundles of collagen fibers in a connective tissue stained with a silver method.  The collagen fibers show a typical wavy appearance.
Bundles of collagen fibers in a connective tissue stained with a silver method. The collagen fibers show a typical wavy appearance.PREMIUM
Cross section of a collecting duct, located in the medullary region of the kidney. It is lined by a simple columnar epithelium.
Cross section of a collecting duct, located in the medullary region of the kidney. It is lined by a simple columnar epithelium.PREMIUM
False colour transmission electron microscope (TEM) micrograph showing many lysosomes (red). Some of them, with rounded clear zones inside, are lipofuscin granules. On the left side, there is a noradrenaline cell (blue).
False colour transmission electron microscope (TEM) micrograph showing many lysosomes (red). Some of them, with rounded clear zones inside, are lipofuscin granules. On the left side, there is a noradrenaline cell (blue).PREMIUM
Cross section of intestinal glands (crypts of Lieberkühn) showing mucous goblet cells. Human colon. Reklamní fotografie
Cross section of intestinal glands (crypts of Lieberkühn) showing mucous goblet cells. Human colon.PREMIUM
Transmission electron microscope (TEM) micrograph showing the cytoplasm of a protein-synthetizing cell, full of parallel cisterns of rough endoplasmic reticulum. Reklamní fotografie
Transmission electron microscope (TEM) micrograph showing the cytoplasm of a protein-synthetizing cell, full of parallel cisterns of rough endoplasmic reticulum.PREMIUM
Layers of a human hair follicle in cross section. From outside: hyaline layer, outer root sheath, Henle’s and Huxley’s layers, inner root sheath, and hair shaft in the center.
Layers of a human hair follicle in cross section. From outside: hyaline layer, outer root sheath, Henle’s and Huxley’s layers, inner root sheath, and hair shaft in the center.PREMIUM
False colour transmission electron microscope (TEM) micrograph showing melanin granules (magenta) in a skin epithelial cell. Bundles of keratin filaments (green) and a desmosome (red) can also be seen.
False colour transmission electron microscope (TEM) micrograph showing melanin granules (magenta) in a skin epithelial cell. Bundles of keratin filaments (green) and a desmosome (red) can also be seen.PREMIUM
Liver stained with H&E. Many of the hepatocytes show two nuclei or they have a very large nucleus. These cells are polyploid cells. The hepatocytes also contain abundant granules of bile pigment.
Liver stained with H&E. Many of the hepatocytes show two nuclei or they have a very large nucleus. These cells are polyploid cells. The hepatocytes also contain abundant granules of bile pigment.PREMIUM
False colour transmission electron microscope (TEM) micrograph showing the sex vesicle (paired sex chromosomes in a spermatocyte) (dark red). Nucleus is green, nucleolus dark blue, NORs magenta and nuclear envelope, light blue.  Reklamní fotografie
False colour transmission electron microscope (TEM) micrograph showing the sex vesicle (paired sex chromosomes in a spermatocyte) (dark red). Nucleus is green, nucleolus dark blue, NORs magenta and nuclear envelope, light blue. PREMIUM
Layers of a human hair follicle in longitudinal section. From outside: hyaline layer, outer root sheath, Henle’s and Huxley’s layers, inner root sheath, and hair shaft in the center.
Layers of a human hair follicle in longitudinal section. From outside: hyaline layer, outer root sheath, Henle’s and Huxley’s layers, inner root sheath, and hair shaft in the center.PREMIUM
Low magnification of a human prostate gland in a 70-year-old man. The prostate gland appears with dilated alveoli, which contains many corpora amylacea (prostatic concretions) in their lumen. Light microscope micrograph. Hematoxylin & eosin stain.
Low magnification of a human prostate gland in a 70-year-old man. The prostate gland appears with dilated alveoli, which contains many corpora amylacea (prostatic concretions) in their lumen. Light microscope micrograph. Hematoxylin & eosin stain.PREMIUM
False colour transmission electron microscope (TEM) micrograph showing a nucleolus of atypical aspect. These peculiar nucleoli can be easily seen in the fetal ovary during the female meiotic prophase I. In this case, it looks like a shooting target. Reklamní fotografie
False colour transmission electron microscope (TEM) micrograph showing a nucleolus of atypical aspect. These peculiar nucleoli can be easily seen in the fetal ovary during the female meiotic prophase I. In this case, it looks like a shooting target.PREMIUM
Low power micrograph of a human seminal vesicle. Each vesicle consists of a single tube folded and coiled on itself. The mucosa shows many irregular and complex folds that sometimes appear as "blind pockets".
Low power micrograph of a human seminal vesicle. Each vesicle consists of a single tube folded and coiled on itself. The mucosa shows many irregular and complex folds that sometimes appear as "blind pockets". PREMIUM
Mikrograf transmisního elektronového mikroskopu (TEM) těla neuronových buněk ukazující mitochondrie, lysosomy, RER, Golgiho systém a jádro (vpravo).
Mikrograf transmisního elektronového mikroskopu (TEM) těla neuronových buněk ukazující mitochondrie, lysosomy, RER, Golgiho systém a jádro (vpravo).PREMIUM
False colour transmission electron microscope (TEM) micrograph showing a nucleolus. The fibrilar component appears as a thick-coiled filament called nucleololema (blue). The fibrilar centers which contains the nucleolus organiser regions (NORs) are labelled in green.
False colour transmission electron microscope (TEM) micrograph showing a nucleolus. The fibrilar component appears as a thick-coiled filament called nucleololema (blue). The fibrilar centers which contains the nucleolus organiser regions (NORs) are labelled in green. PREMIUM
Cross sectioned spinal cord stained with Luxol Fast Blue. The grey matter is located in the centre and is surrounded by the white matter, which is stained in blue because it is rich in myelinated fibers.
Cross sectioned spinal cord stained with Luxol Fast Blue. The grey matter is located in the centre and is surrounded by the white matter, which is stained in blue because it is rich in myelinated fibers.PREMIUM
Stratified columnar epithelium. It is a rare type of epithelium composed of columnar cells arranged in several layers (usually only two). Large excretory duct of a salivary gland. Reklamní fotografie
Stratified columnar epithelium. It is a rare type of epithelium composed of columnar cells arranged in several layers (usually only two). Large excretory duct of a salivary gland.PREMIUM
Human liver cirrhosis. The hepatocytes are organized in regenerative nodules surrounded by fibrous connective tissue septa with chronic inflammatory infiltrates.  Brown pigment depots are also seen. Reklamní fotografie
Human liver cirrhosis. The hepatocytes are organized in regenerative nodules surrounded by fibrous connective tissue septa with chronic inflammatory infiltrates. Brown pigment depots are also seen.PREMIUM
Sagittal section of a human pineal gland. Numerous calcareous concretions can be seen, most of them broken by artefact. Light microscope micrograph stained with hematoxylin-eosin.
Sagittal section of a human pineal gland. Numerous calcareous concretions can be seen, most of them broken by artefact. Light microscope micrograph stained with hematoxylin-eosin.PREMIUM
Cross section of an artery, showing an atheroma plaque which reduces drastically the blood vessel lumen, situated at the right. Reklamní fotografie
Cross section of an artery, showing an atheroma plaque which reduces drastically the blood vessel lumen, situated at the right.PREMIUM
False colour transmission electron microscope (TEM) showing the nucleus of a protein-synthesizing cell. The nuclear envelope (yellow), chromatin (green), nucleoplasm (light brown) and nucleolus (magenta) can be seen. The cytoplasm (cian) is full of RER.
False colour transmission electron microscope (TEM) showing the nucleus of a protein-synthesizing cell. The nuclear envelope (yellow), chromatin (green), nucleoplasm (light brown) and nucleolus (magenta) can be seen. The cytoplasm (cian) is full of RER.PREMIUM
False colour transmission electron microscope (TEM) micrograph of a gonadotropic cell of a castrated animal showing FSL-LH granules (green), lysosomes (red) and large swellings of the RER (blue), due to the castration.  Reklamní fotografie
False colour transmission electron microscope (TEM) micrograph of a gonadotropic cell of a castrated animal showing FSL-LH granules (green), lysosomes (red) and large swellings of the RER (blue), due to the castration. PREMIUM
Sagittal section of a young cerebellum showing many ramified cerebellar lamellae. Light micrograph. Hematoxylin & eosin stain.
Sagittal section of a young cerebellum showing many ramified cerebellar lamellae. Light micrograph. Hematoxylin & eosin stain.PREMIUM
Light micrograph of a senile plaque stained with a silver impregnation. A pyramidal neuron with a neurofibrillary tangle also can be seen. Both alterations are seen in the Alzheimer disease. Reklamní fotografie
Light micrograph of a senile plaque stained with a silver impregnation. A pyramidal neuron with a neurofibrillary tangle also can be seen. Both alterations are seen in the Alzheimer disease.PREMIUM
Cross section of a human fallopian tube. The innermost layer is a very folded mucosa. Outside are located the muscular layer and the serosa layer, showing abundant blood vessels, Light micrograph.
Cross section of a human fallopian tube. The innermost layer is a very folded mucosa. Outside are located the muscular layer and the serosa layer, showing abundant blood vessels, Light micrograph.PREMIUM
Low magnification micrograph showing a human thyroid. The thyroid parenchyma is composed by many follicle filled with colloid. Light microscope micrograph. Hematoxylin & eosin stain Reklamní fotografie
Low magnification micrograph showing a human thyroid. The thyroid parenchyma is composed by many follicle filled with colloid. Light microscope micrograph. Hematoxylin & eosin stainPREMIUM
White adipocytes or fat cells fixed with osmium tetroxide, which stain the lipid content in black.
White adipocytes or fat cells fixed with osmium tetroxide, which stain the lipid content in black. PREMIUM
Mikrograf transmisního elektronového mikroskopu (TEM) ukazující ooogonium s atypickým jádrem. V cytoplazmě lze vidět mitochondrie a kapičky lipidů. Reklamní fotografie
Mikrograf transmisního elektronového mikroskopu (TEM) ukazující ooogonium s atypickým jádrem. V cytoplazmě lze vidět mitochondrie a kapičky lipidů.PREMIUM
Light micrograph showing the stratum spinosum (bottom) and the stratum granulosum (granular layer) of the skin epidermis.
Light micrograph showing the stratum spinosum (bottom) and the stratum granulosum (granular layer) of the skin epidermis.PREMIUM
Light microscope image of a human liver. The hepatic cords are separated by clear areas, where the hepatic sinusoids are located. Histological slide stained with hematoxylin-eosin.
Light microscope image of a human liver. The hepatic cords are separated by clear areas, where the hepatic sinusoids are located. Histological slide stained with hematoxylin-eosin.PREMIUM
Two muscular arteries, two veins and three lymphatic vessels surrounded by adipose tissue. The lymphatic vessels are identified by having lymphocytes located inside them. Light microscope micrograph. Hematoxylin & eosin stain.
Two muscular arteries, two veins and three lymphatic vessels surrounded by adipose tissue. The lymphatic vessels are identified by having lymphocytes located inside them. Light microscope micrograph. Hematoxylin & eosin stain.PREMIUM
Section of human kidney stained with PAS (Periodic Acid-Schiff) to highlight the basement membranes of glomerular capillary loops and tubular epithelium.
Section of human kidney stained with PAS (Periodic Acid-Schiff) to highlight the basement membranes of glomerular capillary loops and tubular epithelium.PREMIUM
Microscopic image showing a urinary bladder papilloma. The papillae are coated with normal transitional (urothelial) epithelium.
Microscopic image showing a urinary bladder papilloma. The papillae are coated with normal transitional (urothelial) epithelium.PREMIUM
Light microscope micrograph of a senile cerebrum, stained with a silver method. The round dense structures correspond to senile plaques, frequently seen in the Alzheimer disease.

 Reklamní fotografie
Light microscope micrograph of a senile cerebrum, stained with a silver method. The round dense structures correspond to senile plaques, frequently seen in the Alzheimer disease. PREMIUM
Cross section of the trachea, showing C-shaped tracheal rings of hyaline cartilage. The tracheal mucosa is located inside cartilage. Low magnification micrograph.
Cross section of the trachea, showing C-shaped tracheal rings of hyaline cartilage. The tracheal mucosa is located inside cartilage. Low magnification micrograph.PREMIUM
Corpus albicans. Human ovary. The corpus albicans is the regressed form of the corpus luteum. After the corpus luteum degenerates, it is replaced by white scar of fibrous tissue made by type I collagen.
Corpus albicans. Human ovary. The corpus albicans is the regressed form of the corpus luteum. After the corpus luteum degenerates, it is replaced by white scar of fibrous tissue made by type I collagen.PREMIUM
Eosinophil granulocytes in an inflammatory infiltrate. This type of white blood cell is responsible for combating parasites, and have a role in mechanisms associated with allergy and asthma. Reklamní fotografie
Eosinophil granulocytes in an inflammatory infiltrate. This type of white blood cell is responsible for combating parasites, and have a role in mechanisms associated with allergy and asthma.PREMIUM
Two sections of the epididymal duct surrounded by concentric layers of fibromuscular tissue. The pseudostratified epithelium consists of tall columnar cells showing stereocilia, and basal cells. The lumen is filled with sperm cells.
Two sections of the epididymal duct surrounded by concentric layers of fibromuscular tissue. The pseudostratified epithelium consists of tall columnar cells showing stereocilia, and basal cells. The lumen is filled with sperm cells.PREMIUM
False color transmission electron microscope (TEM) micrograph showing melanin granules in a skin epithelial cell. Bundles of keratin filaments and a desmosome can also be seen. Reklamní fotografie
False color transmission electron microscope (TEM) micrograph showing melanin granules in a skin epithelial cell. Bundles of keratin filaments and a desmosome can also be seen.PREMIUM
Transmission electron microscope (TEM) micrograph showing a nucleolus. The fibrilar component appears as a thick-coiled filament called nucleololema, wich contains several paler regions, the fibrilar centers, which correspond to the nucleolus organiser regions (NORs).
Transmission electron microscope (TEM) micrograph showing a nucleolus. The fibrilar component appears as a thick-coiled filament called nucleololema, wich contains several paler regions, the fibrilar centers, which correspond to the nucleolus organiser regions (NORs).PREMIUM
High magnification light micrograph showing osteocytes stained with the Schmorl’s technique. From its elongated cell body, many thin and long processes are directed to the surface of the bone trabeculae.  Reklamní fotografie
High magnification light micrograph showing osteocytes stained with the Schmorl’s technique. From its elongated cell body, many thin and long processes are directed to the surface of the bone trabeculae. PREMIUM
Close-up of a brain slice showing two large intraparenchymal haemorrhages (one of the partially organized). Hypertension is the most frequent cause of this type of stroke.
Close-up of a brain slice showing two large intraparenchymal haemorrhages (one of the partially organized). Hypertension is the most frequent cause of this type of stroke.PREMIUM
Close-up of a gross specimen showing the surface of a human kidney in a case of autosomal dominant polycystic kidney disease (ADPKD). The surface is full of large cysts. ADPKD is caused by mutations in PKD genes that produce a specific abnormal protein that has an adverse effect on tubule development.
Close-up of a gross specimen showing the surface of a human kidney in a case of autosomal dominant polycystic kidney disease (ADPKD). The surface is full of large cysts. ADPKD is caused by mutations in PKD genes that produce a specific abnormal protein that has an adverse effect on tubule development.PREMIUM
Gross specimen showing two brain slices of the frontal lobe showing an intraparenchymal haemorrhage. Hypertension is the most frequent cause of this type of stroke.
Gross specimen showing two brain slices of the frontal lobe showing an intraparenchymal haemorrhage. Hypertension is the most frequent cause of this type of stroke.PREMIUM
Coronal section through a human brain at the thalamus level showing a large abscess, probably of bacterial origin, located in the temporal lobe. The growth of the abscess produces a deviation of the lateral ventricle.
Coronal section through a human brain at the thalamus level showing a large abscess, probably of bacterial origin, located in the temporal lobe. The growth of the abscess produces a deviation of the lateral ventricle.PREMIUM
Coronal section through a human brain at the thalamus level showing a large abscess, probably of bacterial origin, located in the temporal lobe. The growth of the abscess produces a deviation of the lateral ventricle. Reklamní fotografie
Coronal section through a human brain at the thalamus level showing a large abscess, probably of bacterial origin, located in the temporal lobe. The growth of the abscess produces a deviation of the lateral ventricle.PREMIUM
Low power light microscope micrograph of a human submandibular or submaxillary gland. This is a mixed salivary gland with predominance of serous acini. The PAS stain highlights the mucous component of the mixed tubule acini.
Low power light microscope micrograph of a human submandibular or submaxillary gland. This is a mixed salivary gland with predominance of serous acini. The PAS stain highlights the mucous component of the mixed tubule acini.PREMIUM
Human spleen. Lymphoid follicle, a component of white pulp. On top, a periarteriolar lymphoid sheath, another component of white pulp. The rest of micrograph is the red pulp, composed by splenic sinusoids and cord of Billroth showing macrophages with iron pigment
Human spleen. Lymphoid follicle, a component of white pulp. On top, a periarteriolar lymphoid sheath, another component of white pulp. The rest of micrograph is the red pulp, composed by splenic sinusoids and cord of Billroth showing macrophages with iron pigmentPREMIUM
Human liver. Cirrhosis. Low magnification micrograph showing regenerating nodules of hepatocytes (with an extensive fatty change), separated by fibrous septa with chronic inflammatory infiltrates. Cirrhosis of the liver is a result of severe damage to the liver. The hard scar tissue that replaces healthy liver tissue. Cirrhosis can lead to liver failure and liver cancer.
Human liver. Cirrhosis. Low magnification micrograph showing regenerating nodules of hepatocytes (with an extensive fatty change), separated by fibrous septa with chronic inflammatory infiltrates. Cirrhosis of the liver is a result of severe damage to the liver. The hard scar tissue that replaces healthy liver tissue. Cirrhosis can lead to liver failure and liver cancer.PREMIUM
High magnification TEM micrograph of the nucleolus of a hepatocyte showing the dense fibrillar component and the granular component.
High magnification TEM micrograph of the nucleolus of a hepatocyte showing the dense fibrillar component and the granular component.PREMIUM
Human aorta. Dissecting aneurysm or aortic dissection. Low magnification micrograph showing a dissecting aneurysm located in the middle layer of the aorta wall. Macrophages loaded with iron pigment appear in the detachment zone.
Human aorta. Dissecting aneurysm or aortic dissection. Low magnification micrograph showing a dissecting aneurysm located in the middle layer of the aorta wall. Macrophages loaded with iron pigment appear in the detachment zone.PREMIUM
Large-bowel adenocarcinoma. Cancer cells arranged in cords or strands with empty central spaces remembering the normal crypts of the colon mucosa.
Large-bowel adenocarcinoma. Cancer cells arranged in cords or strands with empty central spaces remembering the normal crypts of the colon mucosa.PREMIUM
Liver. Erythroblastosis fetalis is characterized by intravascular proliferation of immature precursors of erythrocytes. Histologically, accumulation of erythroblasts in blood sinusoids is observed Reklamní fotografie
Liver. Erythroblastosis fetalis is characterized by intravascular proliferation of immature precursors of erythrocytes. Histologically, accumulation of erythroblasts in blood sinusoids is observedPREMIUM
Low magnification micrograph of a seminoma, a germ cell malignant tumor of the testicle. The micrograph shows a lobular pattern of clear cancerous cells with a fibrous stromal network. Reklamní fotografie
Low magnification micrograph of a seminoma, a germ cell malignant tumor of the testicle. The micrograph shows a lobular pattern of clear cancerous cells with a fibrous stromal network.PREMIUM
Human fallopian tube affected by chronic salpingitis. The fallopian tube lumen is enlarged, the mucosal folds widened and shortened, and the lamina propria shows chronic inflammatory infiltrates.
Human fallopian tube affected by chronic salpingitis. The fallopian tube lumen is enlarged, the mucosal folds widened and shortened, and the lamina propria shows chronic inflammatory infiltrates.PREMIUM
Human liver. Cirrhosis. Low magnification micrograph showing regenerating nodules of hepatocytes (with an extensive fatty change), separated by fibrous septa with chronic inflammatory infiltrates. Cirrhosis of the liver is a result of severe damage to the liver. The hard scar tissue that replaces healthy liver tissue. Cirrhosis can lead to liver failure and liver cancer.
Human liver. Cirrhosis. Low magnification micrograph showing regenerating nodules of hepatocytes (with an extensive fatty change), separated by fibrous septa with chronic inflammatory infiltrates. Cirrhosis of the liver is a result of severe damage to the liver. The hard scar tissue that replaces healthy liver tissue. Cirrhosis can lead to liver failure and liver cancer.PREMIUM
Transmission electron micrograph (TEM) showing two desmosomes (maculae adherentes) with prominent dense plaques where keratin intermediate filaments were attached. Reklamní fotografie
Transmission electron micrograph (TEM) showing two desmosomes (maculae adherentes) with prominent dense plaques where keratin intermediate filaments were attached.PREMIUM
Crypts of large bowel mucosa in cross section showing the abundance of goblet cells. The lamina propria shows many lymphocytes.
Crypts of large bowel mucosa in cross section showing the abundance of goblet cells. The lamina propria shows many lymphocytes.PREMIUM
Human lung affected by an acute bronchopneumonia, commonly a hospital-acquired bacterial pneumonia. The lumen of alveoli is occupied by liquid of oedema which contains acute inflammatory infiltrates (with predominance of neutrophil granulocytes). On the right, a bronchus filled with pus.
Human lung affected by an acute bronchopneumonia, commonly a hospital-acquired bacterial pneumonia. The lumen of alveoli is occupied by liquid of oedema which contains acute inflammatory infiltrates (with predominance of neutrophil granulocytes). On the right, a bronchus filled with pus.PREMIUM
Periphery of a human lung affected by an acute pneumonia. The lumen of alveoli is occupied by liquid of oedema which contains acute inflammatory infiltrates (with predominance of neutrophil granulocytes). On the right, the pleura shows many carbon-loaded macrophages.
Periphery of a human lung affected by an acute pneumonia. The lumen of alveoli is occupied by liquid of oedema which contains acute inflammatory infiltrates (with predominance of neutrophil granulocytes). On the right, the pleura shows many carbon-loaded macrophages.PREMIUM
Human liver. Micronodular cirrhosis. Regenerating nodule of hepatocytes showing an extensive fatty change (steatosis), separated by fibrous septa with chronic inflammatory infiltrates. Reklamní fotografie
Human liver. Micronodular cirrhosis. Regenerating nodule of hepatocytes showing an extensive fatty change (steatosis), separated by fibrous septa with chronic inflammatory infiltrates.PREMIUM
Liver. Erythroblastosis fetalis is characterized by intravascular proliferation of immature precursors of erythrocytes. Histologically, accumulation of erythroblasts in blood sinusoids is observed
Liver. Erythroblastosis fetalis is characterized by intravascular proliferation of immature precursors of erythrocytes. Histologically, accumulation of erythroblasts in blood sinusoids is observedPREMIUM
Liver. Erythroblastosis fetalis is characterized by intravascular proliferation of immature precursors of erythrocytes. Histologically, accumulation of erythroblasts in blood sinusoids is observed
Liver. Erythroblastosis fetalis is characterized by intravascular proliferation of immature precursors of erythrocytes. Histologically, accumulation of erythroblasts in blood sinusoids is observedPREMIUM
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