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    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
    Red blood cells — Stock Photo
    Red blood cells
    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
    Copepod, coloured scanning electron micrograph (SEM). — Stock Photo
    Copepod, coloured scanning electron micrograph (SEM).
    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.
    Osteoporotic bone abnormality — Stock Photo
    Osteoporotic bone abnormality
    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.
    Female copepod with eggs — Stock Photo
    Female copepod with eggs
    Gall bladder. Coloured scanning electron micrograph (SEM) of the surface of a gall bladder. This mucosa lining is made up of cuboidal epithelial cells (green) — Stock Photo
    Gall bladder. Coloured scanning electron micrograph (SEM) of the surface of a gall bladder. This mucosa lining is made up of cuboidal epithelial cells (green)
    Blood clot or thrombus — Stock Photo
    Blood clot or thrombus
    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
    Escherichia coli bacteria — Stock Photo
    Escherichia coli bacteria
    Blood clot structure — Stock Photo
    Blood clot structure
    Fungal cells with sporangia and spores — Stock Photo
    Fungal cells with sporangia and spores
    Colored scanning electron micrograph of osteosarcoma bone cancer cell. — Stock Photo
    Colored scanning electron micrograph of osteosarcoma bone cancer cell.
    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
    Colored scanning electron micrograph of osteosarcoma bone cancer cell. — Stock Photo
    Colored scanning electron micrograph of osteosarcoma bone cancer cell.
    Milkwort pollen grain — Stock Photo
    Milkwort pollen grain
    Coiled proboscis of a moth — Stock Photo
    Coiled proboscis of a moth
    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
    Morphology of Activated platelets — Stock Photo
    Morphology of Activated platelets
    Strawberry pollen grain — Stock Photo
    Strawberry pollen grain
    Dense connective tissue, coloured scanning electron micrograph (SEM). — Stock Photo
    Dense connective tissue, coloured scanning electron micrograph (SEM).
    Coloured scanning electron micrograph of cancer cells from colon. — Stock Photo
    Coloured scanning electron micrograph of cancer cells from colon.
    Tendon showing bundles of collagen fibres — Stock Photo
    Tendon showing bundles of collagen fibres
    Didinium sp. ciliate protozoa, coloured scanning electron micrograph (SEM). These tiny single-celled organisms are found in freshwater and marine habitats — Stock Photo
    Didinium sp. ciliate protozoa, coloured scanning electron micrograph (SEM). These tiny single-celled organisms are found in freshwater and marine habitats
    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
    Mobile phone speaker, colored scanning electron micrograph. — Stock Photo
    Mobile phone speaker, colored scanning electron micrograph.
    Blood clot or thrombus — Stock Photo
    Blood clot or thrombus
    Mobile phone speaker, colored scanning electron micrograph. — Stock Photo
    Mobile phone speaker, colored scanning electron micrograph.
    Kidney glomeruli. Coloured scanning electron micrograph (SEM) of a resin cast of glomeruli capillaries and the larger blood vessels supplying them with blood — Stock Photo
    Kidney glomeruli. Coloured scanning electron micrograph (SEM) of a resin cast of glomeruli capillaries and the larger blood vessels supplying them with blood
    Fungal cells and sporangia — Stock Photo
    Fungal cells and sporangia
    Blood clotting in an ovarian follicle — Stock Photo
    Blood clotting in an ovarian follicle
    Photosynthetic Navicula sp. diatom — Stock Photo
    Photosynthetic Navicula sp. diatom
    Immature dog sperm — Stock Photo
    Immature dog sperm
    Colored scanning electron micrograph of rod-shaped Gram-negative bacteria Escherichia coli, commonly known as E coli. — Stock Photo
    Colored scanning electron micrograph of rod-shaped Gram-negative bacteria Escherichia coli, commonly known as E coli.
    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
    Fracture through the thyroid gland — Stock Photo
    Fracture through the thyroid gland
    Fractured pancreas tissue — Stock Photo
    Fractured pancreas tissue
    Colored scanning electron micrograph of scales from silverfish insect living fossil. — Stock Photo
    Colored scanning electron micrograph of scales from silverfish insect living fossil.
    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
    Hair shafts growing from human skin — Stock Photo
    Hair shafts growing from human skin
    Escherichia coli bacteria — Stock Photo
    Escherichia coli bacteria
    Scanning electron micrograph of bacterial culture from sputum. — Stock Photo
    Scanning electron micrograph of bacterial culture from sputum.
    Crystalline lens of the eye — Stock Photo
    Crystalline lens of the eye
    Asparagus beetle head — Stock Photo
    Asparagus beetle head
    Pollen threads and brochosomes — Stock Photo
    Pollen threads and brochosomes
    Pollen grains from a bellflower — Stock Photo
    Pollen grains from a bellflower
    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.
    Pollen grains from a bellflower — Stock Photo
    Pollen grains from a bellflower
    Escherichia coli bacteria — Stock Photo
    Escherichia coli bacteria
    Angel trumpets pollen — Stock Photo
    Angel trumpets pollen
    Myelinated nerve fibres — Stock Photo
    Myelinated nerve fibres
    Skimmia sp. pollen grain — Stock Photo
    Skimmia sp. pollen grain
    Red blood cells — Stock Photo
    Red blood cells
    Crenated red blood cells — Stock Photo
    Crenated red blood cells
    Cannabis plant. Coloured scanning electron micrograph (SEM) of the surface of a cannabis (Cannabis sativa) plant. The pointed hairs are called lithocyst cells. They contain cystoliths (calcium carbonate crystals) — Stock Photo
    Cannabis plant. Coloured scanning electron micrograph (SEM) of the surface of a cannabis (Cannabis sativa) plant. The pointed hairs are called lithocyst cells. They contain cystoliths (calcium carbonate crystals)
    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.
    Cannabis plant. Coloured scanning electron micrograph (SEM) of the surface of a cannabis (Cannabis sativa) plant. The pointed hairs are called lithocyst cells. They contain cystoliths (calcium carbonate crystals) — Stock Photo
    Cannabis plant. Coloured scanning electron micrograph (SEM) of the surface of a cannabis (Cannabis sativa) plant. The pointed hairs are called lithocyst cells. They contain cystoliths (calcium carbonate crystals)
    Colored scanning electron micrograph of variety of yeast species growing in larval tunnel of codling moth Cydia pomonella in mature apple. — Stock Photo
    Colored scanning electron micrograph of variety of yeast species growing in larval tunnel of codling moth Cydia pomonella in mature apple.