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    Leech, coloured scanning electron micrograph (SEM). — Stock Photo
    Leech, coloured scanning electron micrograph (SEM).
    Pyoderma skin disease — Stock Photo
    Pyoderma skin disease
    Leech, coloured scanning electron micrograph (SEM). — Stock Photo
    Leech, coloured scanning electron micrograph (SEM).
    Pyoderma skin disease — Stock Photo
    Pyoderma skin disease
    Villi from the lining of the jejunum — Stock Photo
    Villi from the lining of the jejunum
    House dust mites — Stock Photo
    House dust mites
    House dust mites — Stock Photo
    House dust mites
    Leech, coloured scanning electron micrograph (SEM). — Stock Photo
    Leech, coloured scanning electron micrograph (SEM).
    Water flea (Polyphemus pediculus), coloured scanning electron micrograph (SEM). — Stock Photo
    Water flea (Polyphemus pediculus), coloured scanning electron micrograph (SEM).
    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.
    Colored scanning electron micrograph of pollen grains from Nymphaeaceae water lily flower. — Stock Photo
    Colored scanning electron micrograph of pollen grains from Nymphaeaceae water lily flower.
    Coloured scanning electron micrograph of pollen grains from Verbena bonariensis perennial plant. — Stock Photo
    Coloured scanning electron micrograph of pollen grains from Verbena bonariensis perennial plant.
    Coloured scanning electron micrograph of activated platelets attached to surgical gauze. — Stock Photo
    Coloured scanning electron micrograph of activated platelets attached to surgical gauze.
    Intestinal brush border in small intestine showing numerous microvilli, colored transmission electron micrograph. — Stock Photo
    Intestinal brush border in small intestine showing numerous microvilli, colored transmission electron micrograph.
    Tendon, coloured scanning electron micrograph showing bundles of collagen fibres. — Stock Photo
    Tendon, coloured scanning electron micrograph showing bundles of collagen fibres.
    Colored X-ray of section through thoracic spine of senior male patient with ankylosing spondylitis with severe degeneration of lower thoracic spine. — Stock Photo
    Colored X-ray of section through thoracic spine of senior male patient with ankylosing spondylitis with severe degeneration of lower thoracic spine.
    Healthy human brain — Stock Photo
    Healthy human brain
    Caenorhabditis elegans parasite worm, colored scanning electron micrograph. — Stock Photo
    Caenorhabditis elegans parasite worm, colored scanning electron micrograph.
    Abstract coloured scanning electron micrograph of crystalline surface of fractured gallstone. — Stock Photo
    Abstract coloured scanning electron micrograph of crystalline surface of fractured gallstone.
    Colored scanning electron micrograph of pollen grains from marigold flower. — Stock Photo
    Colored scanning electron micrograph of pollen grains from marigold flower.
    Phytoplankton diatom Coscinodiscus sp — Stock Photo
    Phytoplankton diatom Coscinodiscus sp
    Ankle of patient with osteoarthritis — Stock Photo
    Ankle of patient with osteoarthritis
    Methicillin-resistant Staphylococcus aureus — Stock Photo
    Methicillin-resistant Staphylococcus aureus
    Pyoderma skin disease — Stock Photo
    Pyoderma skin disease
    Tendon, coloured scanning electron micrograph (SEM), showing bundles of collagen fibres. The parallel alignment of the fibres make tendons inelastic but flexible. Tendons attach muscle to bone. Magnification: x5000 when printed at 10 centimetres wide — Stock Photo
    Tendon, coloured scanning electron micrograph (SEM), showing bundles of collagen fibres. The parallel alignment of the fibres make tendons inelastic but flexible. Tendons attach muscle to bone. Magnification: x5000 when printed at 10 centimetres wide
    Escherichia coli bacteria — Stock Photo
    Escherichia coli bacteria
    Breast cancer cells growing in culture — Stock Photo
    Breast cancer cells growing in culture
    Person with hands on their head, headache, coloured X-ray. — Stock Photo
    Person with hands on their head, headache, coloured X-ray.
    Rapeseed pollen grain — Stock Photo
    Rapeseed pollen grain
    House dust mite — Stock Photo
    House dust mite
    Coloured scanning electron micrograph of activated platelets attached to surgical gauze. — Stock Photo
    Coloured scanning electron micrograph of activated platelets attached to surgical gauze.
    Brain with aneurysm in the middle cerebral artery — Stock Photo
    Brain with aneurysm in the middle cerebral artery
    Coloured profile computed tomography (CT) scan of the healthy torso of a 60 year old patient. — Stock Photo
    Coloured profile computed tomography (CT) scan of the healthy torso of a 60 year old patient.
    Immature dog sperm — Stock Photo
    Immature dog sperm
    Colored scanning electron micrograph of osteosarcoma bone cancer cell. — Stock Photo
    Colored scanning electron micrograph of osteosarcoma bone cancer cell.
    Heart capillary with red blood cell between muscle fibres, colored scanning electron micrograph. — Stock Photo
    Heart capillary with red blood cell between muscle fibres, colored scanning electron micrograph.
    Colored scanning electron micrograph of starch grains in seed of legume. — Stock Photo
    Colored scanning electron micrograph of starch grains in seed of legume.
    Intestinal lining. Coloured scanning electron micrograph (SEM) of a freeze-fractured of the small intestine. The surface consists of deep folds, called villi. The intestinal surface( yellow) is exposed to food — Stock Photo
    Intestinal lining. Coloured scanning electron micrograph (SEM) of a freeze-fractured of the small intestine. The surface consists of deep folds, called villi. The intestinal surface( yellow) is exposed to food
    Copepod, coloured scanning electron micrograph (SEM). — Stock Photo
    Copepod, coloured scanning electron micrograph (SEM).
    Cancer cell clinging to human colon tissue, conceptual illustration. — Stock Photo
    Cancer cell clinging to human colon tissue, conceptual illustration.
    Total hip replacement, — Stock Photo
    Total hip replacement,
    Skin blood vessel. Coloured scanning electron micrograph (SEM) of a blood vessel (arteriole) in the dermis of the skin. In the blood vessel are red blood cells (erythrocytes, red) which carry oxygen around the body — Stock Photo
    Skin blood vessel. Coloured scanning electron micrograph (SEM) of a blood vessel (arteriole) in the dermis of the skin. In the blood vessel are red blood cells (erythrocytes, red) which carry oxygen around the body
    Hair shafts growing from human skin — Stock Photo
    Hair shafts growing from human skin
    Human hair shafts, digital illustration. — Stock Photo
    Human hair shafts, digital illustration.
    Green goat willow twigs (Salix caprea), coloured X-ray. — Stock Photo
    Green goat willow twigs (Salix caprea), coloured X-ray.
    Colored scanning electron micrograph of pollen grains from convolvulus flower. — Stock Photo
    Colored scanning electron micrograph of pollen grains from convolvulus flower.
    Normal elbow and wrist joints, X-ray — Stock Photo
    Normal elbow and wrist joints, X-ray
    MRI scan of normal brain — Stock Photo
    MRI scan of normal brain
    Scanning electron micrograph of dermestid beetle head. — Stock Photo
    Scanning electron micrograph of dermestid beetle head.
    Prosthetic knee joint — Stock Photo
    Prosthetic knee joint
    Composite image of nasal epithelium and pollen. Coloured Scanning Electron Micrograph (SEM) of the surface of nasal epithelium with inhaled in pollen. — Stock Photo
    Composite image of nasal epithelium and pollen. Coloured Scanning Electron Micrograph (SEM) of the surface of nasal epithelium with inhaled in pollen.
    Dividing prostate cancer cells, coloured scanning electron micrograph. — Stock Photo
    Dividing prostate cancer cells, coloured scanning electron micrograph.
    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.
    Nasturtium leaf. Coloured scanning electron micrograph (SEM) of the underside of a nasturtium leaf (Tropaeolum sp.). Numerous hairs (trichomes) cover the surface — Stock Photo
    Nasturtium leaf. Coloured scanning electron micrograph (SEM) of the underside of a nasturtium leaf (Tropaeolum sp.). Numerous hairs (trichomes) cover the surface
    Illustration of fruiting bodies and hyphae of fungus Aspergillus fumigatus. — Stock Photo
    Illustration of fruiting bodies and hyphae of fungus Aspergillus fumigatus.
    Scanning electron micrograph of dermestid beetle head. — Stock Photo
    Scanning electron micrograph of dermestid beetle head.
    Lineata moon shells, coloured X-ray. — Stock Photo
    Lineata moon shells, coloured X-ray.
    Coloured X-ray of arthritic knees — Stock Photo
    Coloured X-ray of arthritic knees
    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.
    Sperm in a fallopian tube. Coloured composition scanning electron micrograph (SEM) of human sperm travelling through a fallopian tube (oviduct) of a female — Stock Photo
    Sperm in a fallopian tube. Coloured composition scanning electron micrograph (SEM) of human sperm travelling through a fallopian tube (oviduct) of a female