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    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 — 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
    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
    Areolar connective tissue, light micrograph. — Stock Photo
    Areolar connective tissue, light micrograph.
    Ant head. Coloured scanning electron micrograph (SEM) of the head of an ant (family Formicidae). showing its large compound eyes (blue) 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 (blue) and jaws. Magnification: x50 when printed 10 centimetres wide.
    Vaginal bacteria. Coloured scanning electron micrograph (SEM) of bacteria on the vaginal wall. A healthy vaginal flora protects the body against urogenital infections — Stock Photo
    Vaginal bacteria. Coloured scanning electron micrograph (SEM) of bacteria on the vaginal wall. A healthy vaginal flora protects the body against urogenital infections
    Section through a nasal polyp — Stock Photo
    Section through a nasal polyp
    Colored scanning electron micrograph of Streptococcus mutans anaerobic bacteria in normal bacteria flora of mouth. — Stock Photo
    Colored scanning electron micrograph of Streptococcus mutans anaerobic bacteria in normal bacteria flora of mouth.
    Lobar pneumonia in stage of grey hepatisation or late consolidation, digital illustration and light micrograph. — Stock Photo
    Lobar pneumonia in stage of grey hepatisation or late consolidation, digital illustration and light micrograph.
    Scanning electron micrograph of bacterial culture from sputum. — Stock Photo
    Scanning electron micrograph of bacterial culture from sputum.
    Coloured scanning electron micrograph of bacteria on surface of human tongue. — Stock Photo
    Coloured scanning electron micrograph of bacteria on surface of human tongue.
    Trachea lining. Coloured transmission electron micrograph (TEM) of a longitudinal section through the lining of the trachea (windpipe), which links the larynx (voicebox) to the lungs — Stock Photo
    Trachea lining. Coloured transmission electron micrograph (TEM) of a longitudinal section through the lining of the trachea (windpipe), which links the larynx (voicebox) to the lungs
    Radiolarians amoeboid protozoa — Stock Photo
    Radiolarians amoeboid protozoa
    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.
    Red blood cells — Stock Photo
    Red blood cells
    Fibroblast cell, coloured scanning electron micrograph (SEM). — Stock Photo
    Fibroblast cell, coloured scanning electron micrograph (SEM).
    Pyoderma skin disease — Stock Photo
    Pyoderma skin disease
    Male sex cell — Stock Photo
    Male sex cell
    Rapeseed pollen grain — Stock Photo
    Rapeseed pollen grain
    Fibrosarcoma cells in late stage of mitosis — Stock Photo
    Fibrosarcoma cells in late stage of mitosis
    Staphylococcus aureus coccoid bacteria, colored scanning electron micrograph. — Stock Photo
    Staphylococcus aureus coccoid bacteria, colored scanning electron micrograph.
    Chlamydia bacteria, illustration — Stock Photo
    Chlamydia bacteria, illustration
    Freshwater single diatom — Stock Photo
    Freshwater single diatom
    Coloured scanning electron micrograph (SEM) of a human red blood cell (erythrocyte, red) and a white blood cell (leucoocyte, blue). — Stock Photo
    Coloured scanning electron micrograph (SEM) of a human red blood cell (erythrocyte, red) and a white blood cell (leucoocyte, blue).
    Streptomyces coelicoflavus bacteria — Stock Photo
    Streptomyces coelicoflavus bacteria
    Fractured myelinated nerve fibres — Stock Photo
    Fractured myelinated nerve fibres
    Tendon, coloured scanning electron micrograph showing bundles of collagen fibres. — Stock Photo
    Tendon, coloured scanning electron micrograph showing bundles of collagen fibres.
    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 (SEM) of Pediculus humanus capitis, human head lice. P. humanus is divided into two subspecies; the head louse P. humanus capitis and the body louse P. humanus corporis — Stock Photo
    Coloured scanning electron micrograph (SEM) of Pediculus humanus capitis, human head lice. P. humanus is divided into two subspecies; the head louse P. humanus capitis and the body louse P. humanus corporis
    Lime tree stem — Stock Photo
    Lime tree stem
    Cross section of human cartilage and bone, light micrograph. Haematoxylin and eosin stain. — Stock Photo
    Cross section of human cartilage and bone, light micrograph. Haematoxylin and eosin stain.
    Escherichia coli on the surface of human skin — Stock Photo
    Escherichia coli on the surface of human skin
    Carcinoma cell, coloured transmission electron micrograph (TEM). — Stock Photo
    Carcinoma cell, coloured transmission electron micrograph (TEM).
    Gastrotrich eggs. Coloured scanning electron micrograph (SEM) of a Chaetonotus sp. gastrotrich eggs. Gastrotrichs are microscopic, worm-like animals found in both freshwater and marine habitats — Stock Photo
    Gastrotrich eggs. Coloured scanning electron micrograph (SEM) of a Chaetonotus sp. gastrotrich eggs. Gastrotrichs are microscopic, worm-like animals found in both freshwater and marine habitats
    Leech, coloured scanning electron micrograph (SEM). — Stock Photo
    Leech, coloured scanning electron micrograph (SEM).
    Epithelium of a foliate papillae of the tongue — Stock Photo
    Epithelium of a foliate papillae of the tongue
    Scanning electron micrograph (SEM) of a PC12 neurone in culture. — Stock Photo
    Scanning electron micrograph (SEM) of a PC12 neurone in culture.
    Helianthus stem. Light micrograph (LM) of stem of perennial sunflower (Helianthus sp.) in cross-section showing vascular bundles (green, yellow). Vascular tissues transport water and dissolved substances inside plant — Stock Photo
    Helianthus stem. Light micrograph (LM) of stem of perennial sunflower (Helianthus sp.) in cross-section showing vascular bundles (green, yellow). Vascular tissues transport water and dissolved substances inside plant
    Light micrograph (bottom left) and computer illustration (top right) of the lining of the stomach, known as the mucosa. — Stock Photo
    Light micrograph (bottom left) and computer illustration (top right) of the lining of the stomach, known as the mucosa.
    Section through the cerebellum in the brain — Stock Photo
    Section through the cerebellum in the brain
    Acute pyelonephritis, computer illustration and light micrograph — Stock Photo
    Acute pyelonephritis, computer illustration and light micrograph
    Sensory palps of Rabbit flea — Stock Photo
    Sensory palps of Rabbit flea
    Structure of trachea, light micrograph. — Stock Photo
    Structure of trachea, light micrograph.
    Light micrograph of shoot meristem. This is the tissue in most plants containing undifferentiated cells. Meristematic cells give rise to various organs of a plant and are responsible for growth. — Stock Photo
    Light micrograph of shoot meristem. This is the tissue in most plants containing undifferentiated cells. Meristematic cells give rise to various organs of a plant and are responsible for growth.
    Coloured scanning electron micrograph (SEM) of immature dog sperm. — Stock Photo
    Coloured scanning electron micrograph (SEM) of immature dog sperm.
    Gall bladder lining — Stock Photo
    Gall bladder lining
    Cross-section through a cotton stem — Stock Photo
    Cross-section through a cotton stem
    Pharmaceutical research. Potential new medicines and vaccines on electron micrograph of virus — Stock Photo
    Pharmaceutical research. Potential new medicines and vaccines on electron micrograph of virus
    Giant cell tumour of the bone — Stock Photo
    Giant cell tumour of the bone
    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.
    Kiwi fruit (Actinidia deliciosa) pollen grain, coloured scanning electron micrograph (SEM). — Stock Photo
    Kiwi fruit (Actinidia deliciosa) pollen grain, coloured scanning electron micrograph (SEM).
    Colon lining and mucous producing cells — Stock Photo
    Colon lining and mucous producing cells
    Freshwater single diatom — Stock Photo
    Freshwater single diatom
    Gastrotrich eggs. Coloured scanning electron micrograph (SEM) of a Chaetonotus sp. gastrotrich eggs. Gastrotrichs are microscopic, worm-like animals found in both freshwater and marine habitats — Stock Photo
    Gastrotrich eggs. Coloured scanning electron micrograph (SEM) of a Chaetonotus sp. gastrotrich eggs. Gastrotrichs are microscopic, worm-like animals found in both freshwater and marine habitats
    Light micrograph of a section through the choroid plexus of brain, showing two corpora amylacea (purple, bottom). — Stock Photo
    Light micrograph of a section through the choroid plexus of brain, showing two corpora amylacea (purple, bottom).
    Illustration of human kidney and light micrograph of section with glomerulus. — Stock Photo
    Illustration of human kidney and light micrograph of section with glomerulus.
    Colored scanning electron micrograph of predatory ciliate protozoan Loxophyllum. — Stock Photo
    Colored scanning electron micrograph of predatory ciliate protozoan Loxophyllum.
    Amoeba shell. Coloured scanning electron micrograph (SEM) of a shell from a Euglypha sp. amoeba. — Stock Photo
    Amoeba shell. Coloured scanning electron micrograph (SEM) of a shell from a Euglypha sp. amoeba.
    Section through a wart — Stock Photo
    Section through a wart
    Lung cancer, digital illustration and light micrograph showing lung adenocarcinoma. — Stock Photo
    Lung cancer, digital illustration and light micrograph showing lung adenocarcinoma.
    Colored scanning electron micrograph of pollen grains from convolvulus flower. — Stock Photo
    Colored scanning electron micrograph of pollen grains from convolvulus flower.