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    Fat cell. Coloured scanning electron micrograph (SEM) of part of a fat-storing cell (adipocytes). Fat cells are one of the largest cell types in the human body, each cell being 100 to 120 microns in diameter — Stock Photo
    Fat cell. Coloured scanning electron micrograph (SEM) of part of a fat-storing cell (adipocytes). Fat cells are one of the largest cell types in the human body, each cell being 100 to 120 microns in diameter
    Knee joint, computer illustration — Stock Photo
    Knee joint, computer illustration
    Rabies virus, illustration. Rabies virus is a member of the Rhabdoviridae family. This bullet-shaped enveloped virus has a protein coat (capsid, blue), which is made up of helically arranged subunits called capsomeres — Stock Photo
    Rabies virus, illustration. Rabies virus is a member of the Rhabdoviridae family. This bullet-shaped enveloped virus has a protein coat (capsid, blue), which is made up of helically arranged subunits called capsomeres
    Hand bones, computer illustration — Stock Photo
    Hand bones, computer illustration
    Resting T lymphocytes. Coloured scanning electron micrograph (SEM) of resting T lymphocytes from a human blood sample. T lymphocytes, or T cells, are a type of white blood cell and components of the body's immune system — Stock Photo
    Resting T lymphocytes. Coloured scanning electron micrograph (SEM) of resting T lymphocytes from a human blood sample. T lymphocytes, or T cells, are a type of white blood cell and components of the body's immune system
    Human Lunate, computer illustration — Stock Photo
    Human Lunate, computer illustration
    Ant head. Coloured scanning electron micrograph (SEM) of the head of an ant (family Formicidae). showing its large compound eyes (red) and jaws. Magnification: x50 when printed 10 centimetres wide. — Stock Photo
    Ant head. Coloured scanning electron micrograph (SEM) of the head of an ant (family Formicidae). showing its large compound eyes (red) and jaws. Magnification: x50 when printed 10 centimetres wide.
    Orb weaver spider (Araneus diadematus) camouflaged on a foxtail plant. — Stock Photo
    Orb weaver spider (Araneus diadematus) camouflaged on a foxtail plant.
    Areolar connective tissue, light micrograph. Haematoxylin and eosin stain. — Stock Photo
    Areolar connective tissue, light micrograph. Haematoxylin and eosin stain.
    Human cardiac tissue, light micrograph. Haematoxylin and eosin stain. — Stock Photo
    Human cardiac tissue, light micrograph. Haematoxylin and eosin stain.
    Lumbar spine, computer illustration — Stock Photo
    Lumbar spine, computer illustration
    Lumbar spine, computer illustration — Stock Photo
    Lumbar spine, computer illustration
    Illustration of antibodies (y-shaped) responding to an infection with the new coronavirus SARS-CoV-2 — Stock Photo
    Illustration of antibodies (y-shaped) responding to an infection with the new coronavirus SARS-CoV-2
    Light micrograph of a cross section of xylem. The xylem is a type of tissue in vascular plants that transports water and some nutrients. — Stock Photo
    Light micrograph of a cross section of xylem. The xylem is a type of tissue in vascular plants that transports water and some nutrients.
    Cancer cells, computer illustration — Stock Photo
    Cancer cells, computer illustration
    Human lung tissue, light micrograph. Lungs are the primary organs of the respiratory system in humans and many other animals. Haematoxylin and eosin stain. — Stock Photo
    Human lung tissue, light micrograph. Lungs are the primary organs of the respiratory system in humans and many other animals. Haematoxylin and eosin stain.
    Cannabis plant. Coloured scanning electron micrograph (SEM) of the surface of a cannabis (Cannabis sativa) plant. The pointed hairs are called lithocyst cells. They contain cystoliths (calcium carbonate crystals) — Stock Photo
    Cannabis plant. Coloured scanning electron micrograph (SEM) of the surface of a cannabis (Cannabis sativa) plant. The pointed hairs are called lithocyst cells. They contain cystoliths (calcium carbonate crystals)
    Coloured scanning electron micrograph (SEM) of a freeze fracture of the vagina showing the stratified squamous epithelium and the underlying lamina propria — Stock Photo
    Coloured scanning electron micrograph (SEM) of a freeze fracture of the vagina showing the stratified squamous epithelium and the underlying lamina propria
    Red blood cells. Coloured scanning electron micrograph (SEM) of red blood cells (RBCs, erythrocytes). Red blood cells are biconcave, disc-shaped cells that transport oxygen from the lungs to body cells — Stock Photo
    Red blood cells. Coloured scanning electron micrograph (SEM) of red blood cells (RBCs, erythrocytes). Red blood cells are biconcave, disc-shaped cells that transport oxygen from the lungs to body cells
    Knee joint, computer illustration — Stock Photo
    Knee joint, computer illustration
    Digger bee (Habropoda sp.) sleeping on a branch. Its turquoise compound eyes are visible here. — Stock Photo
    Digger bee (Habropoda sp.) sleeping on a branch. Its turquoise compound eyes are visible here.
    Small intestine. Coloured scanning electron micrograph (SEM) of a freeze-fractured of the small intestine. The surface consists of deep folds, called villi. The intestinal surface( pink) is exposed to food — Stock Photo
    Small intestine. Coloured scanning electron micrograph (SEM) of a freeze-fractured of the small intestine. The surface consists of deep folds, called villi. The intestinal surface( pink) is exposed to food
    Cerebellum tissue, light micrograph. Haematoxylin and eosin stain. — Stock Photo
    Cerebellum tissue, light micrograph. Haematoxylin and eosin stain.
    Human Metacarpals, computer illustration — Stock Photo
    Human Metacarpals, computer illustration
    Human bone marrow, light micrograph. Haematoxylin and eosin stain. — Stock Photo
    Human bone marrow, light micrograph. Haematoxylin and eosin stain.
    Triquetrum bone, computer illustration — Stock Photo
    Triquetrum bone, computer illustration
    Light micrograph of a cross sections of monocot stem. — Stock Photo
    Light micrograph of a cross sections of monocot stem.
    Seven-spot ladybird (Coccinella septempunctata) sleeping on a plant leaf. — Stock Photo
    Seven-spot ladybird (Coccinella septempunctata) sleeping on a plant leaf.
    Illustration of the ultrastructure of the SARS-CoV-2 coronavirus (previously 2019-nCoV) that was first identified in Wuhan, China, in December 2019. It is an enveloped RNA (ribonucleic acid) virus — Stock Photo
    Illustration of the ultrastructure of the SARS-CoV-2 coronavirus (previously 2019-nCoV) that was first identified in Wuhan, China, in December 2019. It is an enveloped RNA (ribonucleic acid) virus
    Red blood cells. Coloured scanning electron micrograph (SEM) of red blood cells (RBCs, erythrocytes). Red blood cells are biconcave, disc-shaped cells that transport oxygen from the lungs to body cells — Stock Photo
    Red blood cells. Coloured scanning electron micrograph (SEM) of red blood cells (RBCs, erythrocytes). Red blood cells are biconcave, disc-shaped cells that transport oxygen from the lungs to body cells
    Round worms in human intestine, illustration. Roundworms, or nematodes, include numerous free-living and pathogenic species — Stock Photo
    Round worms in human intestine, illustration. Roundworms, or nematodes, include numerous free-living and pathogenic species
    Conceptual illustration of viral encephalitis is an inflammation of the brain caused by a virus. — Stock Photo
    Conceptual illustration of viral encephalitis is an inflammation of the brain caused by a virus.
    Maybug, or cockchafer (Melolontha sp.). — Stock Photo
    Maybug, or cockchafer (Melolontha sp.).
    Human lung tissue, light micrograph. Lungs are the primary organs of the respiratory system in humans and many other animals. Haematoxylin and eosin stain. — Stock Photo
    Human lung tissue, light micrograph. Lungs are the primary organs of the respiratory system in humans and many other animals. Haematoxylin and eosin stain.
    Macrophage (purple) and cancer cells (red), illustration. — Stock Photo
    Macrophage (purple) and cancer cells (red), illustration.
    Conceptual illustration of viral encephalitis is an inflammation of the brain caused by a virus. — Stock Photo
    Conceptual illustration of viral encephalitis is an inflammation of the brain caused by a virus.
    3d illustration of Coxiella burnetii bacteria. This bacterium affects humans and other animals such as cattle, sheep, goats, cats and dogs. It is the cause of Q fever, a highly infectious, influenza-like, febrile illness — Stock Photo
    3d illustration of Coxiella burnetii bacteria. This bacterium affects humans and other animals such as cattle, sheep, goats, cats and dogs. It is the cause of Q fever, a highly infectious, influenza-like, febrile illness
    Human Teeth, computer illustration — Stock Photo
    Human Teeth, computer illustration
    Human smooth muscle, light micrograph. Haematoxylin and eosin stain. — Stock Photo
    Human smooth muscle, light micrograph. Haematoxylin and eosin stain.
    Tumour growth, computer illustration — Stock Photo
    Tumour growth, computer illustration
    Thyroid cancer cells, illustration. — Stock Photo
    Thyroid cancer cells, illustration.
    3d illustration of a Golgi apparatus, or body, within a eukaryotic cell. Golgi are membrane-bound organelles that modify and package proteins. — Stock Photo
    3d illustration of a Golgi apparatus, or body, within a eukaryotic cell. Golgi are membrane-bound organelles that modify and package proteins.
    Human Coccyx, computer illustration — Stock Photo
    Human Coccyx, computer illustration
    Stomach lining. Coloured scanning electron micrograph (SEM) of the glandular lining (mucosa) of the stomach. The gastric mucosa secretes the digestive enzymes and hydrochloric acid — Stock Photo
    Stomach lining. Coloured scanning electron micrograph (SEM) of the glandular lining (mucosa) of the stomach. The gastric mucosa secretes the digestive enzymes and hydrochloric acid
    Delicate (Mythimna vitellina) moth larva on a wild plant. — Stock Photo
    Delicate (Mythimna vitellina) moth larva on a wild plant.
    Activated platelets in blood flow, illustration. — Stock Photo
    Activated platelets in blood flow, illustration.
    Blood clot, computer illustration — Stock Photo
    Blood clot, computer illustration
    Hepatocyte cells, light micrograph. Hepatocyte cells are the main parenchymal tissue cells of the liver. Haematoxylin and eosin stain. — Stock Photo
    Hepatocyte cells, light micrograph. Hepatocyte cells are the main parenchymal tissue cells of the liver. Haematoxylin and eosin stain.
    Red and yellow barbet (Trachyphonus erythrocephalus). This barbet is found in woodland and scrubland throughout Kenya, where it builds its nests in termite mounds — Stock Photo
    Red and yellow barbet (Trachyphonus erythrocephalus). This barbet is found in woodland and scrubland throughout Kenya, where it builds its nests in termite mounds
    Scale insects. Coloured scanning electron micrograph (SEM) of scale insects (superfamily Coccoidea) on a leaf. This pest feeds on the plant's sap. It secretes a powdery wax coating that protects it against pesticides and predators — Stock Photo
    Scale insects. Coloured scanning electron micrograph (SEM) of scale insects (superfamily Coccoidea) on a leaf. This pest feeds on the plant's sap. It secretes a powdery wax coating that protects it against pesticides and predators
    Cancer cells, computer illustration — Stock Photo
    Cancer cells, computer illustration
    T-cells (turquoise) binding to cancer cells (pink), illustration. T-lymphocytes, or T-cells, are a type of white blood cell and components of the body's immune system. They mature in the thymus — Stock Photo
    T-cells (turquoise) binding to cancer cells (pink), illustration. T-lymphocytes, or T-cells, are a type of white blood cell and components of the body's immune system. They mature in the thymus
    Scaphoid bone, computer illustration — Stock Photo
    Scaphoid bone, computer illustration
    Proximal phalanges, computer illustration — Stock Photo
    Proximal phalanges, computer illustration
    Human eye nerve, light micrograph. Haematoxylin and eosin stain. — Stock Photo
    Human eye nerve, light micrograph. Haematoxylin and eosin stain.
    Blood clot, computer illustration — Stock Photo
    Blood clot, computer illustration
    Gall bladder. Coloured scanning electron micrograph (SEM) of the surface of a gall bladder. This mucosa lining is made up of cuboidal epithelial cells (green) — Stock Photo
    Gall bladder. Coloured scanning electron micrograph (SEM) of the surface of a gall bladder. This mucosa lining is made up of cuboidal epithelial cells (green)
    Stomach lining. Coloured scanning electron micrograph (SEM) of the glandular lining (mucosa) of the stomach. The gastric mucosa secretes the digestive enzymes and hydrochloric acid — Stock Photo
    Stomach lining. Coloured scanning electron micrograph (SEM) of the glandular lining (mucosa) of the stomach. The gastric mucosa secretes the digestive enzymes and hydrochloric acid
    Halictid bee on a field scabious (Knautia arvensis) flower. — Stock Photo
    Halictid bee on a field scabious (Knautia arvensis) flower.
    Shoulder blade, computer illustration — Stock Photo
    Shoulder blade, computer illustration