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    Hair shafts growing from human skin — Stock Photo
    Hair shafts growing from human skin
    Coloured scanning electron micrograph (SEM) of a freeze-fractured water lily stem showing numerous vascular bundles (blue) and large intercellular air spaces (holes). — Stock Photo
    Coloured scanning electron micrograph (SEM) of a freeze-fractured water lily stem showing numerous vascular bundles (blue) and large intercellular air spaces (holes).
    Scanning electron micrograph of PC12 neurone in culture. — Stock Photo
    Scanning electron micrograph of PC12 neurone in culture.
    Coloured scanning electron micrograph of cancer cells migrating down pores. — Stock Photo
    Coloured scanning electron micrograph of cancer cells migrating down pores.
    Hoverfly head anatomy — Stock Photo
    Hoverfly head anatomy
    Fat (adipose) tissue, coloured scanning electron micrograph (SEM). The fat cells (adipocytes, round) are surrounded by collagen fibres. — Stock Photo
    Fat (adipose) tissue, coloured scanning electron micrograph (SEM). The fat cells (adipocytes, round) are surrounded by collagen fibres.
    Escherichia coli bacteria — Stock Photo
    Escherichia coli bacteria
    Dividing prostate cancer cells, coloured scanning electron micrograph. — Stock Photo
    Dividing prostate cancer cells, coloured scanning electron micrograph.
    Pollen threads and brochosomes — Stock Photo
    Pollen threads and brochosomes
    Asparagus pollen grains — Stock Photo
    Asparagus pollen grains
    Red blood cells — Stock Photo
    Red blood cells
    Coloured scanning electron micrograph (SEM) of immature dog sperm. — Stock Photo
    Coloured scanning electron micrograph (SEM) of immature dog sperm.
    Clothes moth wing scales — Stock Photo
    Clothes moth wing scales
    Coloured scanning electron micrograph (SEM) of the shell of the foraminiferan Orbulina sp. — Stock Photo
    Coloured scanning electron micrograph (SEM) of the shell of the foraminiferan Orbulina sp.
    Fat cells and supportive connective tissue — Stock Photo
    Fat cells and supportive connective tissue
    Bone cancer cells. Coloured scanning electron micrograph of osteosarcoma cancer cells. Osteosarcoma is an aggressive malignant neoplasm arising from primitive transformed mesenchymal cells — Stock Photo
    Bone cancer cells. Coloured scanning electron micrograph of osteosarcoma cancer cells. Osteosarcoma is an aggressive malignant neoplasm arising from primitive transformed mesenchymal cells
    Cells of brewer yeast — Stock Photo
    Cells of brewer yeast
    Scanning electron micrograph of bacterial culture from sputum. — Stock Photo
    Scanning electron micrograph of bacterial culture from sputum.
    Cells of brewer yeast — Stock Photo
    Cells of brewer yeast
    Pollen grains of a common daisy — Stock Photo
    Pollen grains of a common daisy
    Pancreas tissue. Transmission electron micrograph (TEM) of part of the exocrine pancreas. Seen here are zymogen granules and cell nuclei. In the image the endoplasmic reticulum that fills the cytoplasm is clearly visible. — Stock Photo
    Pancreas tissue. Transmission electron micrograph (TEM) of part of the exocrine pancreas. Seen here are zymogen granules and cell nuclei. In the image the endoplasmic reticulum that fills the cytoplasm is clearly visible.
    Coloured scanning electron micrograph of breast cancer cells. — Stock Photo
    Coloured scanning electron micrograph of breast cancer cells.
    Diatoms single-celled algae — Stock Photo
    Diatoms single-celled algae
    Staphylococcus bacteria cluster — Stock Photo
    Staphylococcus bacteria cluster
    Blue colored dust mite, digital illustration. — Stock Photo
    Blue colored dust mite, digital illustration.
    Dividing prostate gland cancer cells, colored scanning electron micrograph. — Stock Photo
    Dividing prostate gland cancer cells, colored scanning electron micrograph.
    Female copepod with eggs — Stock Photo
    Female copepod with eggs
    Campylodiscus fastuosus diatom — Stock Photo
    Campylodiscus fastuosus diatom
    Bluebottle fly foot — Stock Photo
    Bluebottle fly foot
    Zebrafish young. Coloured scanning electron micrograph (SEM) of newly-hatched zebrafish (Danio rerio) young or fry. These fish are used to study embryonic development. The eyes (blue) are seen in the heads. Zebrafish eggs are transparent — Stock Photo
    Zebrafish young. Coloured scanning electron micrograph (SEM) of newly-hatched zebrafish (Danio rerio) young or fry. These fish are used to study embryonic development. The eyes (blue) are seen in the heads. Zebrafish eggs are transparent
    Leukaemia blood cells — Stock Photo
    Leukaemia blood cells
    Fractured myelinated nerve fibres — Stock Photo
    Fractured myelinated nerve fibres
    Colored digital illustration of parasitic dust mites. — Stock Photo
    Colored digital illustration of parasitic dust mites.
    Colored scanning electron micrograph of human red blood cells erythrocytes, white blood cells leukocytes and platelet thrombocyte. — Stock Photo
    Colored scanning electron micrograph of human red blood cells erythrocytes, white blood cells leukocytes and platelet thrombocyte.
    Coloured scanning electron micrograph of fresh water centric diatoms frustules type of algae. — Stock Photo
    Coloured scanning electron micrograph of fresh water centric diatoms frustules type of algae.
    Coloured scanning electron micrograph (SEM) of a foraminiferan microfossil from maldives beach sand. — Stock Photo
    Coloured scanning electron micrograph (SEM) of a foraminiferan microfossil from maldives beach sand.
    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.
    Coloured scanning electron micrograph (SEM) of immature dog sperm. — Stock Photo
    Coloured scanning electron micrograph (SEM) of immature dog sperm.
    Coloured scanning electron micrograph of bacteria from culture of breast milk. — Stock Photo
    Coloured scanning electron micrograph of bacteria from culture of breast milk.
    Human eyelash mites — Stock Photo
    Human eyelash mites
    Colored scanning electron micrograph of osteosarcoma bone cancer cell. — Stock Photo
    Colored scanning electron micrograph of osteosarcoma bone cancer cell.
    Colored digital illustration of parasitic dust mites. — Stock Photo
    Colored digital illustration of parasitic dust mites.
    Asparagus beetle head — Stock Photo
    Asparagus beetle head
    Illustration of Lactobacillus colony — Stock Photo
    Illustration of Lactobacillus colony
    Coloured scanning electron micrograph (SEM) of adenocarcinoma (cancer) of the uterus. — Stock Photo
    Coloured scanning electron micrograph (SEM) of adenocarcinoma (cancer) of the uterus.
    Mixed oral bacteria — Stock Photo
    Mixed oral bacteria
    Lychnocanoma radiolarian shell — Stock Photo
    Lychnocanoma radiolarian shell
    Cashmere wool fibres, coloured scanning electron micrograph (SEM). — Stock Photo
    Cashmere wool fibres, coloured scanning electron micrograph (SEM).
    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
    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
    Blood clot or thrombus — Stock Photo
    Blood clot or thrombus
    Dendritic cells of immune system — Stock Photo
    Dendritic cells of immune system
    Strawberry pollen grain — Stock Photo
    Strawberry pollen grain
    Trachea (wind pipe) lining, coloured scanning electron micrograph (SEM). — Stock Photo
    Trachea (wind pipe) lining, coloured scanning electron micrograph (SEM).
    Non-activated blood cell fragments platelets, coloured scanning electron micrograph. — Stock Photo
    Non-activated blood cell fragments platelets, coloured scanning electron micrograph.
    Dead bluebottle fly — Stock Photo
    Dead bluebottle fly
    Colored scanning electron micrograph of immature pig sperm from epididymis. — Stock Photo
    Colored scanning electron micrograph of immature pig sperm from epididymis.
    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.
    Albumen crystals, coloured scanning electron micrograph (SEM). — Stock Photo
    Albumen crystals, coloured scanning electron micrograph (SEM).
    Coloured scanning electron micrograph (SEM) of a fractured bile duct. — Stock Photo
    Coloured scanning electron micrograph (SEM) of a fractured bile duct.