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    Neurone embedded in grey matter — Stock Photo
    Neurone embedded in grey matter
    Eyelash follicle, coloured scanning electron micrograph (SEM). — Stock Photo
    Eyelash follicle, coloured scanning electron micrograph (SEM).
    Colored scanning electron micrograph of lymphoma cell showing early apoptotic change. — Stock Photo
    Colored scanning electron micrograph of lymphoma cell showing early apoptotic change.
    Coloured scanning electron micrograph of bacteria on surface of human tongue. — Stock Photo
    Coloured scanning electron micrograph of bacteria on surface of human tongue.
    Sperm cell in a fallopian tube — Stock Photo
    Sperm cell in a fallopian tube
    Digital artwork of T-lymphocyte cells attacking red cancer cell. — Stock Photo
    Digital artwork of T-lymphocyte cells attacking red cancer cell.
    Tumour affecting the pituitary gland — Stock Photo
    Tumour affecting the pituitary gland
    Climbing lily pollen — Stock Photo
    Climbing lily pollen
    Pyoderma skin disease — Stock Photo
    Pyoderma skin disease
    Prosthetic knee joint — Stock Photo
    Prosthetic knee joint
    Horse chestnut pollen grain — Stock Photo
    Horse chestnut pollen grain
    Piece of cake with close-up of Staphylococcus bacteria, food poisoning conceptual illustration. — Stock Photo
    Piece of cake with close-up of Staphylococcus bacteria, food poisoning conceptual illustration.
    Red blood cells and platelets — Stock Photo
    Red blood cells and platelets
    Varicella zoster virus particle — Stock Photo
    Varicella zoster virus particle
    T lymphocyte cells attached to cancer cell — Stock Photo
    T lymphocyte cells attached to cancer cell
    Old church in English countryside — Stock Photo
    Old church in English countryside
    Cilia covering the epithelial lining of the nasopharyx — Stock Photo
    Cilia covering the epithelial lining of the nasopharyx
    Influenza viruses budding from host cell — Stock Photo
    Influenza viruses budding from host cell
    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.
    Digital illustration of pollen grain on anther of Chinese hibiscus flower. — Stock Photo
    Digital illustration of pollen grain on anther of Chinese hibiscus flower.
    Breast cancer screening — Stock Photo
    Breast cancer screening
    Finger-like projections of the duodenum — Stock Photo
    Finger-like projections of the duodenum
    Od shaped bacteria Tragelaphus — Stock Photo
    Od shaped bacteria Tragelaphus
    Blood clot structure — Stock Photo
    Blood clot structure
    Cardiac muscle from a healthy heart — Stock Photo
    Cardiac muscle from a healthy heart
    Heart pacemaker, X-ray — Stock Photo
    Heart pacemaker, X-ray
    Varicella zoster virus particle — Stock Photo
    Varicella zoster virus particle
    Water flea (Polyphemus pediculus), coloured scanning electron micrograph (SEM). — Stock Photo
    Water flea (Polyphemus pediculus), coloured scanning electron micrograph (SEM).
    Breast cancer screening — Stock Photo
    Breast cancer screening
    Fractured myelinated nerve fibres — Stock Photo
    Fractured myelinated nerve fibres
    Digital artwork of T-lymphocyte cells attacking red cancer cell. — Stock Photo
    Digital artwork of T-lymphocyte cells attacking red cancer cell.
    Villi from the lining of the jejunum — Stock Photo
    Villi from the lining of the jejunum
    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.
    Carcinoma cell, coloured transmission electron micrograph (TEM). — Stock Photo
    Carcinoma cell, coloured transmission electron micrograph (TEM).
    Human hair shafts, digital illustration. — Stock Photo
    Human hair shafts, digital illustration.
    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.
    Fallopian tube, TEM — Stock Photo
    Fallopian tube, TEM
    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.
    Pyoderma skin disease — Stock Photo
    Pyoderma skin disease
    Finger-like projections of the duodenum — Stock Photo
    Finger-like projections of the duodenum
    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.
    Digital illustration of pollen grain on anther of Chinese hibiscus flower. — Stock Photo
    Digital illustration of pollen grain on anther of Chinese hibiscus flower.
    Coiled proboscis of a moth — Stock Photo
    Coiled proboscis of a moth
    Leech, coloured scanning electron micrograph (SEM). — Stock Photo
    Leech, coloured scanning electron micrograph (SEM).
    Pair of child's jelly shoes, coloured X-ray. — Stock Photo
    Pair of child's jelly shoes, coloured X-ray.
    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.
    Coloured frontal X-ray of an artificial knee joint (white). — Stock Photo
    Coloured frontal X-ray of an artificial knee joint (white).
    Pollen grains from a bellflower — Stock Photo
    Pollen grains from a bellflower
    Scanning electron micrograph (SEM) of a PC12 neurone in culture. — Stock Photo
    Scanning electron micrograph (SEM) of a PC12 neurone in culture.
    Coloured frankincense. This aromatic resin is tapped from the Boswellia sacra tree. It is used in aromatherapy and is widely associated with religious ceremonies. — Stock Photo
    Coloured frankincense. This aromatic resin is tapped from the Boswellia sacra tree. It is used in aromatherapy and is widely associated with religious ceremonies.
    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
    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
    House dust mites — Stock Photo
    House dust mites
    Scanning electron micrograph of PC12 neurone in culture. — Stock Photo
    Scanning electron micrograph of PC12 neurone in culture.
    Mixed oral bacteria — Stock Photo
    Mixed oral bacteria
    Varicella zoster virus particle — Stock Photo
    Varicella zoster virus particle
    Microvilli from the small intestine — Stock Photo
    Microvilli from the small intestine
    Phytoplankton diatom Coscinodiscus sp — Stock Photo
    Phytoplankton diatom Coscinodiscus sp
    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.