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367 results

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    Red blood cells — Stock Photo
    Red blood cells
    Female copepod with eggs — Stock Photo
    Female copepod with eggs
    Hair shafts growing from human skin — Stock Photo
    Hair shafts growing from human skin
    Flowering currant pollen — Stock Photo
    Flowering currant pollen
    Immature dog sperm — Stock Photo
    Immature dog sperm
    Red blood cells with fibrin — Stock Photo
    Red blood cells with fibrin
    Pollen threads and brochosomes — Stock Photo
    Pollen threads and brochosomes
    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
    Stick insect foot — Stock Photo
    Stick insect foot
    Staphylococcus bacteria cluster — Stock Photo
    Staphylococcus bacteria cluster
    Acanthocystis. Coloured scanning electron micrograph (SEM) of a centrohelid heliozoan with tangential plate-scales and radial spines — Stock Photo
    Acanthocystis. Coloured scanning electron micrograph (SEM) of a centrohelid heliozoan with tangential plate-scales and radial spines
    Stomach lining. Coloured scanning electron micrograph (SEM) of the glandular lining (mucosa) of the stomach. The gastric mucosa secretes the digestive enzymes and hydrochloric acid — Stock Photo
    Stomach lining. Coloured scanning electron micrograph (SEM) of the glandular lining (mucosa) of the stomach. The gastric mucosa secretes the digestive enzymes and hydrochloric acid
    House dust mites — Stock Photo
    House dust mites
    Colored scanning electron micrograph of activated T lymphocyte from human blood sample. — Stock Photo
    Colored scanning electron micrograph of activated T lymphocyte from human blood sample.
    Didinium sp. ciliate protozoa, coloured scanning electron micrograph (SEM). These tiny single-celled organisms are found in freshwater and marine habitats. They are predatory organism, feeding on other ciliate protozoans, mainly Paramecium — Stock Photo
    Didinium sp. ciliate protozoa, coloured scanning electron micrograph (SEM). These tiny single-celled organisms are found in freshwater and marine habitats. They are predatory organism, feeding on other ciliate protozoans, mainly Paramecium
    Weevil (Sitophilus sp.), coloured scanning electron micrograph (SEM). This weevil is a major agricultural pest. It primarily attacks stored grains and fruits, feeding on them with its often elongated snout, or rostrum — Stock Photo
    Weevil (Sitophilus sp.), coloured scanning electron micrograph (SEM). This weevil is a major agricultural pest. It primarily attacks stored grains and fruits, feeding on them with its often elongated snout, or rostrum
    Snake red blood cells. Coloured scanning electron micrograph (SEM) of whole and fractured red blood cells (erythrocytes, red) in a small blood vessel of a snake — Stock Photo
    Snake red blood cells. Coloured scanning electron micrograph (SEM) of whole and fractured red blood cells (erythrocytes, red) in a small blood vessel of a snake
    Geranium pollen grain — Stock Photo
    Geranium pollen grain
    Komodo dragon skin, coloured scanning electron micrograph (SEM). The Komodo dragon (Varanus komodoensis) has armoured scaly skin. It is the largest lizard in the world, reaching over three metres in length — Stock Photo
    Komodo dragon skin, coloured scanning electron micrograph (SEM). The Komodo dragon (Varanus komodoensis) has armoured scaly skin. It is the largest lizard in the world, reaching over three metres in length
    Geranium sp. pollen grain — Stock Photo
    Geranium sp. pollen grain
    Cardiac muscle from a healthy heart — Stock Photo
    Cardiac muscle from a healthy heart
    Milkwort pollen grain — Stock Photo
    Milkwort pollen grain
    Myelinated nerve fibres — Stock Photo
    Myelinated nerve fibres
    Skin cancer cell — Stock Photo
    Skin cancer cell
    Scale insects. Coloured scanning electron micrograph (SEM) of scale insects (superfamily Coccoidea) on a leaf. This pest feeds on the plant's sap. It secretes a powdery wax coating that protects it against pesticides and predators — Stock Photo
    Scale insects. Coloured scanning electron micrograph (SEM) of scale insects (superfamily Coccoidea) on a leaf. This pest feeds on the plant's sap. It secretes a powdery wax coating that protects it against pesticides and predators
    Cells of brewer yeast — Stock Photo
    Cells of brewer yeast
    Colored scanning electron micrograph showing urethral epithelium of urethra. — Stock Photo
    Colored scanning electron micrograph showing urethral epithelium of urethra.
    Fungal cells showing sporangium — Stock Photo
    Fungal cells showing sporangium
    Wasp eye numerous lenses — Stock Photo
    Wasp eye numerous lenses
    Crystalline lens of the eye — Stock Photo
    Crystalline lens of the eye
    Male sex cell — Stock Photo
    Male sex cell
    Scanning electron microscopy of DNA molecules and red and white blood cells. — Stock Photo
    Scanning electron microscopy of DNA molecules and red and white blood cells.
    Escherichia coli bacteria — Stock Photo
    Escherichia coli bacteria
    Red blood cells — Stock Photo
    Red blood cells
    Copepod, coloured scanning electron micrograph (SEM). — Stock Photo
    Copepod, coloured scanning electron micrograph (SEM).
    Colored scanning electron micrograph of diatoms photosynthetic single-celled algae. — Stock Photo
    Colored scanning electron micrograph of diatoms photosynthetic single-celled algae.
    Colored scanning electron micrograph of sectioned seminiferous tubule, site of sperm production in human testes. — Stock Photo
    Colored scanning electron micrograph of sectioned seminiferous tubule, site of sperm production in human testes.
    Micrograph of tendon fibres — Stock Photo
    Micrograph of tendon fibres
    Fractured myelinated nerve fibres — Stock Photo
    Fractured myelinated nerve fibres
    Colored scanning electron micrograph showing urethral epithelium of urethra. — Stock Photo
    Colored scanning electron micrograph showing urethral epithelium of urethra.
    Male sex cell — Stock Photo
    Male sex cell
    Fly larva head anatomy — Stock Photo
    Fly larva head anatomy
    Cultured cancer cells — Stock Photo
    Cultured cancer cells
    Deformed sperm cell — Stock Photo
    Deformed sperm cell
    Escherichia coli bacteria — Stock Photo
    Escherichia coli bacteria
    Lymphoma cancer cell. Coloured scanning electron micrograph (SEM) of a lymphoma cell showing early apoptotic changes. A lymphoma is a cell of the immune system that has become cancerous. The cell becomes immortal and can grow indefinitely — Stock Photo
    Lymphoma cancer cell. Coloured scanning electron micrograph (SEM) of a lymphoma cell showing early apoptotic changes. A lymphoma is a cell of the immune system that has become cancerous. The cell becomes immortal and can grow indefinitely
    Milkwort pollen grain — Stock Photo
    Milkwort pollen grain
    Staphylococcus bacteria cluster — Stock Photo
    Staphylococcus bacteria cluster
    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
    Coloured scanning electron micrograph (SEM) of sensory hair cells in the cochlea of the inner ear. — Stock Photo
    Coloured scanning electron micrograph (SEM) of sensory hair cells in the cochlea of the inner ear.
    Colored scanning electron micrograph of pollen grains from convolvulus flower. — Stock Photo
    Colored scanning electron micrograph of pollen grains from convolvulus flower.
    Microvilli of gallbladder surface — Stock Photo
    Microvilli of gallbladder surface
    Blood clotting in an ovarian follicle — Stock Photo
    Blood clotting in an ovarian follicle
    Lymphoma cancer cell — Stock Photo
    Lymphoma cancer cell
    Osteoporotic bone abnormality — Stock Photo
    Osteoporotic bone abnormality
    Colored scanning electron micrograph of activated T lymphocyte from human blood sample. — Stock Photo
    Colored scanning electron micrograph of activated T lymphocyte from human blood sample.
    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.
    Flowering currant pollen grains — Stock Photo
    Flowering currant pollen grains
    Colored scanning electron micrograph of diatoms photosynthetic single-celled algae. — Stock Photo
    Colored scanning electron micrograph of diatoms photosynthetic single-celled algae.
    Male sex cell — Stock Photo
    Male sex cell