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    Mycobacterium smegmatis bacteria — Stock Photo
    Mycobacterium smegmatis bacteria
    Light micrograph of a waterflea, Daphnia pulex, a small freshwater crustacean. — Stock Photo
    Light micrograph of a waterflea, Daphnia pulex, a small freshwater crustacean.
    Surface of the foot of a common pollen beetle — Stock Photo
    Surface of the foot of a common pollen beetle
    Paranasal sinus epithelium — Stock Photo
    Paranasal sinus epithelium
    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
    Liver cirrhosis. Computer illustration and light micrograph of a section through a human liver with from primary biliary cirrhosis. Cirrhosis is a disease in which bands of fibrosis (internal scarring) break up the internal structure of the liver — Stock Photo
    Liver cirrhosis. Computer illustration and light micrograph of a section through a human liver with from primary biliary cirrhosis. Cirrhosis is a disease in which bands of fibrosis (internal scarring) break up the internal structure of the liver
    Coloured scanning electron micrograph (SEM) of squamous epithelial cells on the skin surface. — Stock Photo
    Coloured scanning electron micrograph (SEM) of squamous epithelial cells on the skin surface.
    Horse chestnut leaf. Coloured scanning electron micrograph (SEM) of the underside of a horse chestnut leaf (Aesculus hippocastanum) Numerous hairs (trichomes) cover the surface — Stock Photo
    Horse chestnut leaf. Coloured scanning electron micrograph (SEM) of the underside of a horse chestnut leaf (Aesculus hippocastanum) Numerous hairs (trichomes) cover the surface
    Escherichia coli bacteria — Stock Photo
    Escherichia coli bacteria
    Coloured scanning electron micrograph of 293T cell in early stage of programmed apoptosis cell death. — Stock Photo
    Coloured scanning electron micrograph of 293T cell in early stage of programmed apoptosis cell death.
    Human lip. Coloured scanning electron micrograph (SEM) of a human lip, showing sweat gland openings on the drier external lip surface. These openings (pores) release sweat onto the surface of the skin — Stock Photo
    Human lip. Coloured scanning electron micrograph (SEM) of a human lip, showing sweat gland openings on the drier external lip surface. These openings (pores) release sweat onto the surface of the skin
    Coloured scanning electron micrograph (SEM) of a freeze-fractured water lily stem showing numerous vascular bundles (grey) and large intercellular air spaces (holes). — Stock Photo
    Coloured scanning electron micrograph (SEM) of a freeze-fractured water lily stem showing numerous vascular bundles (grey) and large intercellular air spaces (holes).
    Parasitic dust mite on white background, digital illustration. — Stock Photo
    Parasitic dust mite on white background, digital illustration.
    Earthworm gut, light micrograph — Stock Photo
    Earthworm gut, light micrograph
    Fractured myelinated nerve fibres — Stock Photo
    Fractured myelinated nerve fibres
    Light micrograph of a section through tissue showing an artery (middle ) and a vein (top left). — Stock Photo
    Light micrograph of a section through tissue showing an artery (middle ) and a vein (top left).
    Feet bacteria. Coloured scanning electron micrograph (SEM) of bacteria cultured from between toes of foot — Stock Photo
    Feet bacteria. Coloured scanning electron micrograph (SEM) of bacteria cultured from between toes of foot
    Light micrograph of adipose tissue containing large lipid droplet. — Stock Photo
    Light micrograph of adipose tissue containing large lipid droplet.
    Respiratory syncytial virus — Stock Photo
    Respiratory syncytial virus
    Neutrophil cells aggregating at site of infection — Stock Photo
    Neutrophil cells aggregating at site of infection
    Purkinje cells and their dendritic processes — Stock Photo
    Purkinje cells and their dendritic processes
    Purple colored dust mite, digital illustration. — Stock Photo
    Purple colored dust mite, digital illustration.
    Cat flea head — Stock Photo
    Cat flea head
    Paramecium ciliate protozoan — Stock Photo
    Paramecium ciliate protozoan
    Colored digital illustration of parasitic dust mites. — Stock Photo
    Colored digital illustration of parasitic dust mites.
    Pubic louse, SEM — Stock Photo
    Pubic louse, SEM
    Lobar pneumonia in stage of red hepatisation, digital illustration and light micrograph. — Stock Photo
    Lobar pneumonia in stage of red hepatisation, digital illustration and light micrograph.
    Triceratium sp. diatom algae — Stock Photo
    Triceratium sp. diatom algae
    Nerve. Coloured scanning electron micrograph (SEM) of a freeze-fracture through a peripheral nerve. Schwann cells wraps their cell membrane around the nerve a number of times — Stock Photo
    Nerve. Coloured scanning electron micrograph (SEM) of a freeze-fracture through a peripheral nerve. Schwann cells wraps their cell membrane around the nerve a number of times
    Coloured scanning electron micrograph of 293T cell infected with human immunodeficiency virus. — Stock Photo
    Coloured scanning electron micrograph of 293T cell infected with human immunodeficiency virus.
    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 section through a muscle fibre. — Stock Photo
    Coloured scanning electron micrograph (SEM) of a section through a muscle fibre.
    Osteoporotic bone abnormality — Stock Photo
    Osteoporotic bone abnormality
    Escherichia coli on the surface of human skin — Stock Photo
    Escherichia coli on the surface of human skin
    Clematis montana pollen — Stock Photo
    Clematis montana pollen
    Mycobacterium smegmatis bacteria — Stock Photo
    Mycobacterium smegmatis bacteria
    Chronic pyelonephritis, computer illustration and light micrograph — Stock Photo
    Chronic pyelonephritis, computer illustration and light micrograph
    Light micrograph (LM) of a section through the fingertip. — Stock Photo
    Light micrograph (LM) of a section through the fingertip.
    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
    Stick insect foot — Stock Photo
    Stick insect foot
    Freshwater single diatom — Stock Photo
    Freshwater single diatom
    Dental floss with cheek cells — Stock Photo
    Dental floss with cheek cells
    Dark field light micrograph (LM) of freshwater pennate diatoms. — Stock Photo
    Dark field light micrograph (LM) of freshwater pennate diatoms.
    Smooth hawksbeard (Crepis capillaris) seed, coloured scanning electron micrograph (SEM). — Stock Photo
    Smooth hawksbeard (Crepis capillaris) seed, coloured scanning electron micrograph (SEM).
    Hypodermic needle (26 gauge) and human blood, coloured scanning electron micrograph (SEM). — Stock Photo
    Hypodermic needle (26 gauge) and human blood, coloured scanning electron micrograph (SEM).
    Section of a flower bud — Stock Photo
    Section of a flower bud
    Ovary. Light micrograph (LM) of section through whole ovary. Cortex (outer region) contains numerous corpora lutea (pink) and follicles (purple) at various stages of development — Stock Photo
    Ovary. Light micrograph (LM) of section through whole ovary. Cortex (outer region) contains numerous corpora lutea (pink) and follicles (purple) at various stages of development
    Liver fluke Clonorchis sinensis — Stock Photo
    Liver fluke Clonorchis sinensis
    Bluebottle fly foot — Stock Photo
    Bluebottle fly foot
    Human stomach mucinous adenocarcinoma, computer illustration and light micrograph. — Stock Photo
    Human stomach mucinous adenocarcinoma, computer illustration and light micrograph.
    Gram negative Calymmatobacterium sp. — Stock Photo
    Gram negative Calymmatobacterium sp.
    Lymph node in tuberculosis — Stock Photo
    Lymph node in tuberculosis
    Fat cells and supportive connective tissue — Stock Photo
    Fat cells and supportive connective tissue
    Developing pig eye — Stock Photo
    Developing pig eye
    Bacteria forming Dental plaque — Stock Photo
    Bacteria forming Dental plaque
    Fertilization of human egg — Stock Photo
    Fertilization of human egg
    Colored scanning electron micrograph of stem cell-derived motor neuron cell. — Stock Photo
    Colored scanning electron micrograph of stem cell-derived motor neuron cell.
    Coloured scanning electron micrograph of cancer cells migrating down pores. — Stock Photo
    Coloured scanning electron micrograph of cancer cells migrating down pores.
    Kidney glomerulus and podocyte cells — Stock Photo
    Kidney glomerulus and podocyte cells
    Horse chestnut pollen grain — Stock Photo
    Horse chestnut pollen grain