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    Helicobacter pylori bacterium — Stock Photo
    Helicobacter pylori bacterium
    Influenza viruses budding from host cell — Stock Photo
    Influenza viruses budding from host cell
    Fallopian tube, TEM — Stock Photo
    Fallopian tube, TEM
    Mycobacterium smegmatis bacteria — Stock Photo
    Mycobacterium smegmatis bacteria
    Digital illustration of pollen grains on anther of Chinese hibiscus flower. — Stock Photo
    Digital illustration of pollen grains on anther of Chinese hibiscus flower.
    Human hair shafts, digital illustration. — Stock Photo
    Human hair shafts, digital illustration.
    Skin cancer cell — Stock Photo
    Skin cancer cell
    Coiled proboscis of a moth — Stock Photo
    Coiled proboscis of a moth
    Od shaped bacteria Tragelaphus — Stock Photo
    Od shaped bacteria Tragelaphus
    Pollen threads and brochosomes — Stock Photo
    Pollen threads and brochosomes
    Coloured scanning electron micrograph (SEM) of a tumour cell, showing pseudopodia protrusions (bottom left and right), a prominent feature of actively motile cells. — Stock Photo
    Coloured scanning electron micrograph (SEM) of a tumour cell, showing pseudopodia protrusions (bottom left and right), a prominent feature of actively motile cells.
    Epithelium from a fallopian tube — Stock Photo
    Epithelium from a fallopian tube
    PC12 neurone in culture — Stock Photo
    PC12 neurone in culture
    Vaccinia virus particle — Stock Photo
    Vaccinia virus particle
    Dental plaque scanning electron micrograph — Stock Photo
    Dental plaque scanning electron micrograph
    Prosthetic knee joint — Stock Photo
    Prosthetic knee joint
    Embryonic stem cells — Stock Photo
    Embryonic stem cells
    Digital artwork of T-lymphocyte cells attacking red cancer cell. — Stock Photo
    Digital artwork of T-lymphocyte cells attacking red cancer cell.
    Arthritic hand anatomy — Stock Photo
    Arthritic hand anatomy
    Crenated red blood cells — Stock Photo
    Crenated red blood cells
    Tumour affecting the pituitary gland — Stock Photo
    Tumour affecting the pituitary gland
    Hair follicles of human skin — Stock Photo
    Hair follicles of human skin
    Crypts of Lieberkuhn. Light micrograph (LM). Crypts of Lieberkuhn of the colon shown in cross section. Crypts are long blind-ending tube-like extensions of the surface epithelial lining of the gut — Stock Photo
    Crypts of Lieberkuhn. Light micrograph (LM). Crypts of Lieberkuhn of the colon shown in cross section. Crypts are long blind-ending tube-like extensions of the surface epithelial lining of the gut
    Fractured pancreas tissue — Stock Photo
    Fractured pancreas tissue
    Blood vessel in the lung — Stock Photo
    Blood vessel in the lung
    Shoulder and elbow joints anatomy — Stock Photo
    Shoulder and elbow joints anatomy
    Cilia covering the epithelial lining of the nasopharyx — Stock Photo
    Cilia covering the epithelial lining of the nasopharyx
    Scanning electron micrograph (SEM) of a PC12 neurone in culture. — Stock Photo
    Scanning electron micrograph (SEM) of a PC12 neurone in culture.
    Passion flower pollen — Stock Photo
    Passion flower pollen
    Plankton. Coloured scanning electron micrograph (SEM) of plankton containing mainly Ceratium dinoflagellates. A few diatoms are also present. Dinoflagellates are unicellular protozoans — Stock Photo
    Plankton. Coloured scanning electron micrograph (SEM) of plankton containing mainly Ceratium dinoflagellates. A few diatoms are also present. Dinoflagellates are unicellular protozoans
    Lymphoma cancer cell — Stock Photo
    Lymphoma cancer cell
    Komodo dragon skin, coloured scanning electron micrograph (SEM). The Komodo dragon (Varanus komodoensis) has armoured scaly skin. It is the largest lizard in the world, reaching over three metres in length — Stock Photo
    Komodo dragon skin, coloured scanning electron micrograph (SEM). The Komodo dragon (Varanus komodoensis) has armoured scaly skin. It is the largest lizard in the world, reaching over three metres in length
    Pyoderma skin disease — Stock Photo
    Pyoderma skin disease
    Human hair shafts, digital illustration. — Stock Photo
    Human hair shafts, digital illustration.
    Blastocyst hollow ball of cells with fluid, digital illustration. — Stock Photo
    Blastocyst hollow ball of cells with fluid, digital illustration.
    Villi from the lining of the jejunum — Stock Photo
    Villi from the lining of the jejunum
    Dog hair, coloured scanning electron micrograph (SEM). — Stock Photo
    Dog hair, coloured scanning electron micrograph (SEM).
    Digital illustration of bacteria on tip of needle. — Stock Photo
    Digital illustration of bacteria on tip of needle.
    Fractured myelinated nerve fibres — Stock Photo
    Fractured myelinated nerve fibres
    Blastocyst hollow ball of cells with fluid, digital illustration. — Stock Photo
    Blastocyst hollow ball of cells with fluid, digital illustration.
    Finger-like projections of the duodenum — Stock Photo
    Finger-like projections of the duodenum
    Gram negative Calymmatobacterium sp. — Stock Photo
    Gram negative Calymmatobacterium sp.
    Digital artwork of T-lymphocyte cells attacking red cancer cell. — Stock Photo
    Digital artwork of T-lymphocyte cells attacking red cancer cell.
    Colored scanning electron micrograph of human red blood cells erythrocytes, white blood cells leukocytes and platelet thrombocyte. — Stock Photo
    Colored scanning electron micrograph of human red blood cells erythrocytes, white blood cells leukocytes and platelet thrombocyte.
    Coloured scanning electron micrograph (SEM) of the shell of the foraminiferan Orbulina sp. — Stock Photo
    Coloured scanning electron micrograph (SEM) of the shell of the foraminiferan Orbulina sp.
    Coiled proboscis of a moth — Stock Photo
    Coiled proboscis of a moth
    Chest, neck and head arteries — Stock Photo
    Chest, neck and head arteries
    Coloured computed tomography (CT) scan of a section through the chest of a 76-year-old male patient with a malignant (cancerous) tumour (bright, right) of the bronchus. — Stock Photo
    Coloured computed tomography (CT) scan of a section through the chest of a 76-year-old male patient with a malignant (cancerous) tumour (bright, right) of the bronchus.
    Cilia covering the epithelial lining of the nasopharyx — Stock Photo
    Cilia covering the epithelial lining of the nasopharyx
    Thyroid gland showing the follicles — Stock Photo
    Thyroid gland showing the follicles
    Digital artwork of T-lymphocyte cells attacking red cancer cell. — Stock Photo
    Digital artwork of T-lymphocyte cells attacking red cancer cell.
    Blood clot formation — Stock Photo
    Blood clot formation
    Stunning unique infra red landscape — Stock Photo
    Stunning unique infra red landscape
    Coloured X-rays of the right foot, showing a metal plate and screws (white) in the foot bone beneath the little toe (upper right). — Stock Photo
    Coloured X-rays of the right foot, showing a metal plate and screws (white) in the foot bone beneath the little toe (upper right).
    Coloured scanning electron micrograph of human red blood cells, white blood cells and platelets. — Stock Photo
    Coloured scanning electron micrograph of human red blood cells, white blood cells and platelets.
    Digital illustration of pollen grains on anther of Chinese hibiscus flower. — Stock Photo
    Digital illustration of pollen grains on anther of Chinese hibiscus flower.
    Coloured scanning electron micrograph of osteocyte bone cell surrounded by bone tissue. — Stock Photo
    Coloured scanning electron micrograph of osteocyte bone cell surrounded by bone tissue.
    Normal head and brain, MRI scan — Stock Photo
    Normal head and brain, MRI scan
    Three dinoflagellates (blue), coloured scanning electron micrograph (SEM). Dinoflagellates are unicellular protozoans. — Stock Photo
    Three dinoflagellates (blue), coloured scanning electron micrograph (SEM). Dinoflagellates are unicellular protozoans.
    Pyoderma skin disease — Stock Photo
    Pyoderma skin disease