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    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.
    Chest, neck and head arteries — Stock Photo
    Chest, neck and head arteries
    Tumour affecting the pituitary gland — Stock Photo
    Tumour affecting the pituitary gland
    Human hair shafts, digital illustration. — Stock Photo
    Human hair shafts, digital illustration.
    Breast cancer screening — Stock Photo
    Breast cancer screening
    Blood vessel in the lung — Stock Photo
    Blood vessel in the lung
    Surface of a fallopian tube — Stock Photo
    Surface of a fallopian tube
    Coloured scanning electron micrograph (SEM) of a fractured mucous membrane of the trachea (wind pipe), showing the epithelium and underlying connective tissue. — Stock Photo
    Coloured scanning electron micrograph (SEM) of a fractured mucous membrane of the trachea (wind pipe), showing the epithelium and underlying connective tissue.
    Coloured scanning electron micrograph (SEM) of a foraminiferan microfossil from maldives beach sand. — Stock Photo
    Coloured scanning electron micrograph (SEM) of a foraminiferan microfossil from maldives beach sand.
    Narrowed abdominal arteries, coloured angiogram - blood vessel X-ray . — Stock Photo
    Narrowed abdominal arteries, coloured angiogram - blood vessel X-ray .
    Vaccinia virus particle — Stock Photo
    Vaccinia virus particle
    Finger-like projections of the duodenum — Stock Photo
    Finger-like projections of the duodenum
    Coloured angiogram (blood vessel X-ray) of arteries in the pelvic region. — Stock Photo
    Coloured angiogram (blood vessel X-ray) of arteries in the pelvic region.
    Villi from the lining of the jejunum — Stock Photo
    Villi from the lining of the jejunum
    Epithelium from a fallopian tube — Stock Photo
    Epithelium from a fallopian tube
    Coloured frontal X-ray of a blocked intestine (upper centre). — Stock Photo
    Coloured frontal X-ray of a blocked intestine (upper centre).
    Lymphoma cancer cell — Stock Photo
    Lymphoma cancer cell
    Digital illustration of pollen grains on anther of Chinese hibiscus flower. — Stock Photo
    Digital illustration of pollen grains on anther of Chinese hibiscus flower.
    Old church in English countryside — Stock Photo
    Old church in English countryside
    Carcinoma cell, coloured transmission electron micrograph (TEM). — Stock Photo
    Carcinoma cell, coloured transmission electron micrograph (TEM).
    Pollen threads and brochosomes — Stock Photo
    Pollen threads and brochosomes
    Arthritic hand anatomy — Stock Photo
    Arthritic hand anatomy
    Water flea (Polyphemus pediculus), coloured scanning electron micrograph (SEM). — Stock Photo
    Water flea (Polyphemus pediculus), coloured scanning electron micrograph (SEM).
    Coloured scanning electron micrograph (SEM) of a foraminiferan microfossil from maldives beach sand. — Stock Photo
    Coloured scanning electron micrograph (SEM) of a foraminiferan microfossil from maldives beach sand.
    Pyoderma skin disease — Stock Photo
    Pyoderma skin disease
    Fallopian tube, TEM — Stock Photo
    Fallopian tube, TEM
    Colored scanning electron micrograph of lymphoma cell showing early apoptotic change. — Stock Photo
    Colored scanning electron micrograph of lymphoma cell showing early apoptotic change.
    Breast cancer screening — Stock Photo
    Breast cancer screening
    Pollen threads and brochosomes — Stock Photo
    Pollen threads and brochosomes
    Varicella zoster virus particle — Stock Photo
    Varicella zoster virus particle
    Old church in English countryside — Stock Photo
    Old church in English countryside
    Colored scanning electron micrograph of coccoliths calcium carbonate plates from coccolithophore algal organisms. — Stock Photo
    Colored scanning electron micrograph of coccoliths calcium carbonate plates from coccolithophore algal organisms.
    Influenza viruses budding from host cell — Stock Photo
    Influenza viruses budding from host cell
    Carcinoma cell, coloured transmission electron micrograph (TEM). — Stock Photo
    Carcinoma cell, coloured transmission electron micrograph (TEM).
    Fractured myelinated nerve fibres — Stock Photo
    Fractured myelinated nerve fibres
    Coloured scanning electron micrograph (SEM) of a fractured bile duct. — Stock Photo
    Coloured scanning electron micrograph (SEM) of a fractured bile duct.
    Normal leg veins, coloured angiogram - blood vessel X-ray — Stock Photo
    Normal leg veins, coloured angiogram - blood vessel X-ray
    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.
    Coloured scanning electron micrograph (SEM) of a fractured bile duct. — Stock Photo
    Coloured scanning electron micrograph (SEM) of a fractured bile duct.
    Coloured frontal X-ray of an artificial knee joint (white). — Stock Photo
    Coloured frontal X-ray of an artificial knee joint (white).
    Coloured profile X-ray of fixation devices (white) in the bones of the knee, used to hold the anterior cruciate ligament (not seen) in place. — Stock Photo
    Coloured profile X-ray of fixation devices (white) in the bones of the knee, used to hold the anterior cruciate ligament (not seen) in place.
    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.
    Coloured scanning electron micrograph (SEM) of a section through a foetal olfactory (smelling) sense organ known as the vomeronasal organ (VNO), or Jacobson organ. — Stock Photo
    Coloured scanning electron micrograph (SEM) of a section through a foetal olfactory (smelling) sense organ known as the vomeronasal organ (VNO), or Jacobson organ.
    Fractured pancreas tissue — Stock Photo
    Fractured pancreas tissue
    Fat cells and supportive connective tissue — Stock Photo
    Fat cells and supportive connective tissue
    Colored scanning electron micrograph of osteoblast osteocyte bone cell. — Stock Photo
    Colored scanning electron micrograph of osteoblast osteocyte bone cell.
    Eyelash follicle, coloured scanning electron micrograph (SEM). — Stock Photo
    Eyelash follicle, coloured scanning electron micrograph (SEM).
    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
    Coloured scanning electron micrograph (SEM) of a foraminiferan microfossil from maldives beach sand. — Stock Photo
    Coloured scanning electron micrograph (SEM) of a foraminiferan microfossil from maldives beach sand.
    Fly head anatomy — Stock Photo
    Fly head anatomy
    Retina. Light micrograph (LM) of a section through a retina. The eye works by allowing light to be focused by the lens onto the retina — Stock Photo
    Retina. Light micrograph (LM) of a section through a retina. The eye works by allowing light to be focused by the lens onto the retina
    Influenza viruses and host cell — Stock Photo
    Influenza viruses and host cell
    Finger-like projections of the duodenum — Stock Photo
    Finger-like projections of the duodenum
    Dog hair, coloured scanning electron micrograph (SEM).In dogs several hairs emerge from a single follicle. — Stock Photo
    Dog hair, coloured scanning electron micrograph (SEM).In dogs several hairs emerge from a single follicle.
    Red blood cells — Stock Photo
    Red blood cells
    Kidney glomerulus and podocyte cells — Stock Photo
    Kidney glomerulus and podocyte cells
    Prosthetic knee joint — Stock Photo
    Prosthetic knee joint
    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.
    Phytoplankton diatom Coscinodiscus sp — Stock Photo
    Phytoplankton diatom Coscinodiscus sp
    Diatom eukaryotic algae — Stock Photo
    Diatom eukaryotic algae