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Jose Luis Calvo

Shutterstock-bidragande sedan 28 november 2012.

Spanien

Spanien

Bilder (2 698)Samlingar (20)Om mig

Toppbilder från Jose Luis Calvo

2 698 nya stockbilder, vektorer och illustrationer från Jose Luis Calvo.

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Light micrograph of white adipose tissue stained with hematoxylin and eosin. Adipocytes (fat cells) contains a large lipid droplet. Stockfoto

Liver cells (hepatocytes) seen with the light microscope. Their nuclei show a very large nucleolus stained in red. Stockfoto

Skeletal muscle fibers showing striated myofibrils. Light microscope micrograph. Stockfoto

Thin skin showing the epidermis with its different strata, resting on the dermis. Stockfoto

Pyramidal neurons of the cerebral cortex impregnated with the Golgi method. Stockfoto

Striated muscle fibers of the heart myocardium. The cardiac myocytes have a central single nucleus and peripheral myofibrils. Light microscope micrograph. Stockfoto

Light micrograph of white adipose tissue. Adipocytes (fat cells) contain a large lipid droplet. The structures that traverse diagonally the image are connective tissue septa. H&E stain Stockfoto

Micrograph showing the epidermis and dermis of a human finger skin. The layers of this keratinized stratified squamous epithelium are clearly seen. H&E stain Stockfoto

Striated skeletal muscle fibers showing the cross-striation with dark A bands and light I bands. The Z line stands out in the center of I bands. High magnification light micrograph. Stockfoto

Smooth muscle fibers of the small intestine, longitudinally sectioned, showing typical fusiform nuclei. Stockfoto

The reticular dermis is a dense irregular connective tissue with fibroblasts and densely packed collagen fibers, organized in intertwined fascicles. High magnification micrograph. Stockfoto

Cross-striation of striated skeletal muscle fibers with dark A bands and light I bands. The clear zone in the center of A bands is the H zone. The nuclei are located in the cell periphery Stockfoto

Light micrograph showing a simple columnar epithelium. Human gallbladder. H&E stain Stockfoto

Osteon (Haversian system) seen with the light microscope. The osteocytes show radially oriented processed around a central Haversian canal. Stockfoto

Mitosis in onion cells of the root meristem. In the central rowof cells, there is a prophase cell showing chromosomes. Below, a typical anaphase can be seen. Light microscope micrograph. Stockfoto

Astrocyte processes with end feet applied to the wall of blood vessels. Human cerebral cortex. Cajal's gold sublimate method Stockfoto

Epithelial lining of the exocervix. It is a non-keratinized stratified squamous epithelium, whose most superficial cells retain their nuclei Stockfoto

Pyramidal neurons of the cerebral cortex stained with the Golgi silver chromate. From the conic shaped soma, a large apical dendrite and multiple basal dendrites originate. Stockfoto

Cross sectioned striated muscle fibers of the heart atrium myocardium. The cardiac myocytes have a central single nucleus and peripheral myofibrils. Mallory's phosphotungstic hematoxylin. Stockfoto

Ciliated pseudostratified columnar epithelium of the trachea (respiratory epithelium). Light microscope micrograph. Stockfoto

Cross-sectioned spinal cord surrounded by meninges showing, from outside inside, dura mater (thick), subdural space, arachnoid matter (very thin) and subarachnoid space with nerve roots. Silver stain Stockfoto

Light micrograph of an osteon in compact bone showing osteocyte lacunae and numerous radial canaliculi. Stockfoto

High magnification of a human islet of Langerhans surrounded by exocrine pancreatic acini. Light microscopy. H&E stain. Stockfoto

Keratinized stratified squamous epithelium of the human glabrous skin showing a prominent horny layer. Human finger. H&E stain. Light microscope micrograph. Stockfoto

Pyramidal neurons of the cerebral cortex stained with the Golgi silver chromate. From the conic shaped soma, a large apical dendrite and multiple basal dendrites originate. Stockfoto

Striated skeletal muscle fibers showing the cross-striation with dark A bands and light I bands. The Z line stands out in the center of I bands. High magnification light micrograph. Stockfoto

Blood smear. Chronic myelogenous or granulocytic leukemia. Abundant immature myeloid cells. Wright stain. Stockfoto

Light micrograph of a cross-sectioned muscular artery, showing a thick and wavy internal elastic lamina, a middle layer with smooth muscle fibers, and an outer connective tissue adventitia. H&E stain Stockfoto

Nuclei of smooth muscle cells. These cells show a very elongated fusiform nucleus which contains small nucleoli. H&E stain. Stockfoto

Renal corpuscle seen under a light microscope. The Bowman capsule and the glomerular capillaries are clearly seen. Outside the glomerulus, sections of convoluted tubules are distinguished Stockfoto

Dense irregular connective tissue of reticular dermis showing densely packed bundles of collagen fibers (stained in red). Under the epidermis (blue), the papillary dermis show a more loose tissue. Stockfoto

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. Stockfoto

The key pathologic change of the Duchenne muscular dystrophy is the myonecrosis. At an early phase, necrotic fibers appear swollen, homogeneous and deeply eosinophilic. Stockfoto

Microscope image of a muscular artery stained with hematoxylin-eosin. A prominent internal elastic lamina intima is located between tunica intima and tunica media, wich shows smooth muscle fibers. Stockfoto

Lieberkühn crypts of a human colon mucosa showing abundant goblet cells of pale cytoplasm. Stockfoto

Buccal smear showing desquamated squamous cells of the oral mucosae. Small bluish points located mainly on the right cell are bacteria. Light micrograph. H&E stain. Stockfoto

False colour transmission electron microscope (TEM) micrograph showing mitochondria (blue), glycogen (pink), rough endoplasmic reticulum (red) in the cytoplasm of a hepatocyte. Stockfoto

A pyramidal neuron shown with the Golgi silver chromate. The apical dendritic trunk and the basilar dendrites contain many spines. From the bottom of cell body, the finest and spineless axon arises. Stockfoto

Epidermis of thin skin. From the depth to the surface it can be identified the the basale, spinosum, granulosum and corneum strata. The presence of melanin granules is observed in the deeper layers Stockfoto

Seminiferous tubules of human testis. Light microscope micrograph. H&E stain Stockfoto

Cross sectioned striated muscle fibers of the heart myocardium. The cardiac myocytes have a central single nucleus and peripheral myofibrils. Light micrograph. H&E stain. Stockfoto

Mitosis in onion cells of the root meristem. In the center a typical metaphase can be seen, with chromosomes in the metaphase plate and fibers of mitotic spindle. Light microscope micrograph. Stockfoto

Taste buds in foliate tongue papillae. Many of them show the taste or gustatory pore. H&E stain. Stockfoto

False colour TEM micrograph of a protein-synthetizing cell packed with parallel cisterns of RER with the lumen labelled in blue colour. The cytoplasm, full of ribosomes, is labelled in green color. Stockfoto

Respiratory prismatic ciliated pseudostratified epithelium. The apical border of the epithelium has a layer of cilia supported in their basal bodies. Light microscope photomicrograph Stockfoto

Ciliated pseudostratified columnar epithelium of the trachea (respiratory epithelium). Light microscope micrograph. H&E stain Stockfoto

White adipose tissue stained with HE. Adipocytes (fat cells) contains a large lipid droplet surrounded by a thin layer of cytoplasm. The nucleus is flattened and located on the periphery Stockfoto

Low power micrograph of ovary showing ovarian follicles. From top to bottom primordial, primary and secondary follicles can be seen. H&E stain Stockfoto

Light micrograph of a capillary showing red blood cells in the lumen and elongated nuclei of its endothelial cell lining. H&E stain. Stockfoto

Epithelium of the small intestine. It is a simple columnar epithelium with a well-developed brush border located at its apical pole. Stockfoto

Longitudinal section showing the opening of a pilosebaceous unit: in the center, the hair, in the bottom the sebaceous glands. Stockfoto

Nuclei of smooth muscle cells. These cells show a very elongated fusiform nucleus which contains small nucleoli. The small incisures in the nucleus surface are due to a contraction of the fiber. Stockfoto

False colour TEM showing the nucleus of a protein-synthesizing cell. The nuclear envelope (red), chromatin (green) and nucleolus (blue) can be seen. The cytoplasm is full of RER. Stockfoto

Fontana silver method counterstained with HE. Micrograph showing the location of melanin granules in melanocytes and keratinocytes, being more abundant in the deeper regions of the epithelium. Stockfoto

TEM showing the nucleus of a protein-synthesizing cell. The nuclear envelope, chromatin and nucleolus can be seen. The cytoplasm is full of RER. Stockfoto

Very low magnification micrograph of a distal ileum showings a large aggregate of lymphoid follicles or Peyer’s patch. Stockfoto

Astrocytes in the human cerebral cortex. Cajal's gold sublimate method. Stockfoto

Goblet cells in the ciliated respiratory epithelium of the trachea, with their mucus stained in violet color. Elastic fibers located under the epithelium are also stained. Light microscope picture Stockfoto

Developing bone showing an osteoclast located in its Howships lacuna. The osteoclast is a large multinucleated cell which shows a ruffled border at a site of active bone resorption. H&E Stockfoto

Blood smear showing, in the center, a neutrophil with lobulated nucleus, and eosinophil leukocyte (above of neutrophil) and a lymphocyte. Small blue dots are platelets. Stockfoto

Histological section of an elastic artery (human aorta). The elastic lamellae of tunica media are stained with fuscin (Gallego's method). The collagen fibers of the adventitia appears stained in blue. Stockfoto

Fibrous astrocytes of brain tissue showing many long and thin processes. Golgi's silver chromate method. Stockfoto

High magnification light micrograph of a striated muscle fiber. The sarcomeres display alternating A (dark) and I (light) disks. The Z line stands out in the center of I disks. Stockfoto

Oogonium. False colour TEM micrograph showing the nucleus (green), nuclear envelope (pink), an atypical nucleolus (dark blue). Mitochondria (red) and lipid droplets (yellow) in the cytoplasm (cian). Stockfoto

Mast cell or mastocyte with its cytoplasm filled with large granules rich in histamine and heparin. Outside, the smooth muscle fibers are stained in blue. Light microscope photomicrograph Stockfoto

Epidermis of the thin skin, resting over the dermis. On the surface of the epidermis the stratum corneum is identified. Stockfoto

Striated muscle fibers of the heart myocardium. The cardiac myocytes have a central single nucleus, peripheral striated myofibrils and are joined by intercalated disks. Light microscope micrograph Stockfoto

Transmission electron microscope (TEM) micrograph showing several peripheral myelinated fibers and a Schwann cell (in the center) containing many unmyelinated axons. Stockfoto

Epithelial lining of the lingual or superior surface of epiglottis. It is a non-keratinized stratified squamous epithelium. Below is the connective tissue of lamina propria. H&E stain. Stockfoto

High magnification micrograph of brown adipocytes showing a typical spongy aspect because they stored fat as small lipid droplets. Stockfoto

Mucosa layer of the large intestine with Lieberkühn crypts, lined with numerous goblet cells of pale cytoplasm. The pink layer below is the muscularis mucosae. Human colon. Stockfoto

Eosinophil granulocytes in inflammatory infiltrate. This type of white blood cell is responsible for combating parasites, and have a role in mechanisms associated with allergy and asthma. Stockfoto

False colour transmission electron microscope micrograph showing a continuity between the nuclear envelope and a cistern of the rough endoplasmic reticulum (red). Nucleus (gold). Cytoplasm (blue). Stockfoto

Silver stained spinal cord neuron. The neurofibrils stained with silver nitrate can be seen in both the soma and dendrites of the neuron. Image created with microscope Stockfoto

High magnification of keratinocytes of the stratum spinosum of the epidermis. Surrounding each keratinocyte are numerous spiny-like structures, each of which correspond to a desmosome. Stockfoto

Example of a typical loose connective tissue belonging to the submucosa of the stomach. Collagen appear as isolated fibers and wavy bundles of fibers.

Stockfoto

Light micrograph of a cross section of the wall of the small intestine (duodenum) showing villi and Brunner's glands in the submucosa. Stockfoto

High magnification micrograph of ciliated epithelial cells isolated of human bronchi. In the base of cilia there is a row of basal bodies. Stockfoto

Ciliated pseudostratified columnar epithelium of the trachea (respiratory epithelium). Light microscope micrograph. Pasini method. Stockfoto

Simple columnar epithelium of an excretory duct of the pancreas. Light microscope picture. H&E stain Stockfoto

Transmission electron microscope (TEM) micrograph showing the ultrastructure of a nucleus with a very prominent nucleolus and a remarkable nuclear envelope. Stockfoto

Brown adipocytes stained with H&E. They contain many small lipid droplets distributed throughout the cytoplasm, thus acquiring a spongy appearance. Stockfoto

Histological section of a lymph node showing the cortex with many follicles and a deep paracortex, and the medulla with medullary cords and very enlarged medullary sinuses. Light microscope picture. Stockfoto

Thin skin with brown melanin granules located in melanocytes and keratinocytes, being more abundant in the deeper regions of the epidermis. Stockfoto

Epidermis of the thin skin. It can be identified the stratum basale, spinosum, a narrow stratum granulosum and a superficial well defined stratum corneum. The epidermis rest over the dermis. Stockfoto

Low magnification micrograph of the gastric mucosa showing the surface mucous epithelium, the gastric pits and the fundic glands with many pink parietal cells. Stockfoto

Ciliated pseudostratified columnar epithelium of the trachea (respiratory epithelium). Light microscope micrograph. Stockfoto

Glomerulus of a human kidney stained with Masson trichrome. The glomerular basement membranes appear very prominent stained in blue color Stockfoto

Striated muscle fibers of the heart myocardium stained with H&E. The cardiac myocytes have a central single or double nucleus, peripheral striated myofibrils and are joined by intercalated disks. Stockfoto

Light micrograph showing the stratum spinosum (bottom) and the stratum granulosum (granular layer) of the skin epidermis. Stockfoto

Skeletal striated muscle fibers in cross section showing the presence of several nuclei (multinucleated cells) located in the cell periphery. Light microscope photomicrograph Stockfoto

Sebaceous gland is a holocrine gland whose cells accumulate sebum in clear oil or lipid droplets. Under the secretory unit, the smooth muscle fibers of arrector pili muscle can be seen Stockfoto

High magnification micrograph showing the typical aspect of the lung parenchyma with many alveoli of very thin walls, which contain numerous small capillaries. Stockfoto

Ovarian secondary follicle showing oocyte, antrum or follicular cavity, and the granulosa and the theca layers. Stockfoto

Striated cardiac myocytes showing yellow pigment lipofuscin granules near the central nucleus. The myocytes are joined by intercalated disks. Light micrograph. H&E stain. Stockfoto

Light micrograph showing white (bottom) and brown (top) fat. The larger holes correspond to white adipocytes. Brown adipocytes shows a spongy aspect because they stored fat as small lipid droplets. Stockfoto

Muscular artery, vein and nerve bundles surrounded by adipose tissue, near a lymph node. The artery (right) has a thicker wall and a smaller diameter than the vein (left). H&E stain

Stockfoto

The surface epithelium of the stomach invaginates to form the gastric pits. The pits are lined by a simple columnar epithelium formed by mucous cells. Stockfoto

Pseudostratified columnar epithelium of the epididymis. The epithelial cells show stereocilia in the apical surface. Stockfoto

The reticular dermis is a dense irregular connective tissue with densely packed collagen fibers. Some small blood vessels can also be seen . Stockfoto

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