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    Red blood cells — Stock Photo
    Red blood cells
    Hair follicles. Coloured scanning electron micrograph (SEM). The outer layer of hair (the cuticle) has overlapping scales of keratin. These scales are thought to prevent hairs from matting together — Stock Photo
    Hair follicles. Coloured scanning electron micrograph (SEM). The outer layer of hair (the cuticle) has overlapping scales of keratin. These scales are thought to prevent hairs from matting together
    Colored digital illustration of parasitic dust mites. — Stock Photo
    Colored digital illustration of parasitic dust mites.
    Fat cells and supportive connective tissue — Stock Photo
    Fat cells and supportive connective tissue
    Stick insect foot — Stock Photo
    Stick insect foot
    Skimmia sp. pollen grain — Stock Photo
    Skimmia sp. pollen grain
    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
    Human red blood cells — Stock Photo
    Human red blood cells
    Red blood cells and platelets — Stock Photo
    Red blood cells and platelets
    Coloured scanning electron micrograph (SEM) of epithelial cells lining the human trachea (windpipe). — Stock Photo
    Coloured scanning electron micrograph (SEM) of epithelial cells lining the human trachea (windpipe).
    Portrait of smiling doctor standing in x-ray room at hospital — Stock Photo
    Portrait of smiling doctor standing in x-ray room at hospital
    Leech, coloured scanning electron micrograph (SEM). — Stock Photo
    Leech, coloured scanning electron micrograph (SEM).
    Marine planktonic unicellular alga — Stock Photo
    Marine planktonic unicellular alga
    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.
    Human hair, coloured scanning electron micrograph (SEM). — Stock Photo
    Human hair, coloured scanning electron micrograph (SEM).
    Od shaped bacteria Tragelaphus — Stock Photo
    Od shaped bacteria Tragelaphus
    Cells of brewer yeast — Stock Photo
    Cells of brewer yeast
    Osteosarcoma cancer cell — Stock Photo
    Osteosarcoma cancer cell
    Villi from the lining of the jejunum — Stock Photo
    Villi from the lining of the jejunum
    Diatoms single-celled algae — Stock Photo
    Diatoms single-celled algae
    Leech, coloured scanning electron micrograph (SEM). — Stock Photo
    Leech, coloured scanning electron micrograph (SEM).
    Female Asian tiger mosquito, colored scanning electron micrograph. — Stock Photo
    Female Asian tiger mosquito, colored scanning electron micrograph.
    Coloured scanning electron micrograph (SEM) of the common environmental and allergenic mould (Cladosporium sp.); fungal hyphae producing spores. — Stock Photo
    Coloured scanning electron micrograph (SEM) of the common environmental and allergenic mould (Cladosporium sp.); fungal hyphae producing spores.
    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).
    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.
    Lung cancer cells — Stock Photo
    Lung cancer cells
    Escherichia coli bacteria — Stock Photo
    Escherichia coli bacteria
    Dust mite parasite, microscopic digital illustration. — Stock Photo
    Dust mite parasite, microscopic digital illustration.
    Clothes moth wing scales — Stock Photo
    Clothes moth wing scales
    Fossilised fragment of a coccolithotrope skeleton — Stock Photo
    Fossilised fragment of a coccolithotrope skeleton
    Lining of the small intestine — Stock Photo
    Lining of the small intestine
    Chinese hibiscus pollen — Stock Photo
    Chinese hibiscus pollen
    Angel trumpets pollen — Stock Photo
    Angel trumpets pollen
    Scanning electron micrograph of dermestid beetle head. — Stock Photo
    Scanning electron micrograph of dermestid beetle head.
    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
    T lymphocyte cells attached to cancer cell — Stock Photo
    T lymphocyte cells attached to cancer cell
    Phlox pollen grain — Stock Photo
    Phlox pollen grain
    Ant head. Coloured scanning electron micrograph (SEM) of the head of an ant (family Formicidae). showing its large compound eyes (red) 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 (red) and jaws. Magnification: x50 when printed 10 centimetres wide.
    Fungal cells with sporangia and spores — Stock Photo
    Fungal cells with sporangia and spores
    Geranium sp. pollen grain — Stock Photo
    Geranium sp. pollen grain
    Colored scanning electron micrograph of surface of human fallopian tube with epithelium of columnar cells with cilia. — Stock Photo
    Colored scanning electron micrograph of surface of human fallopian tube with epithelium of columnar cells with cilia.
    Bottlebrush pollen grain — Stock Photo
    Bottlebrush pollen grain
    Coloured scanning electron micrograph (SEM) of a section through a vein in the liver, which is filled with red blood cells (erythrocytes, red). — Stock Photo
    Coloured scanning electron micrograph (SEM) of a section through a vein in the liver, which is filled with red blood cells (erythrocytes, red).
    Pollen threads and brochosomes — Stock Photo
    Pollen threads and brochosomes
    Pollen grains from a bellflower — Stock Photo
    Pollen grains from a bellflower
    Monitor with pictures of teeth and stationery on table in dental — Stock Photo
    Monitor with pictures of teeth and stationery on table in dental
    Blue colored dust mite, digital illustration. — Stock Photo
    Blue colored dust mite, digital illustration.
    White blood cells — Stock Photo
    White blood cells
    Dust mite parasite, microscopic digital illustration. — Stock Photo
    Dust mite parasite, microscopic digital illustration.
    Hands of traveller using self service check-in machine at airport — Stock Photo
    Hands of traveller using self service check-in machine at airport
    Airport security officer using a hand held metal detector to check a passenger in airport — Stock Photo
    Airport security officer using a hand held metal detector to check a passenger in airport
    Hyaline cartilage, a semi-rigid connective tissue — Stock Photo
    Hyaline cartilage, a semi-rigid connective tissue
    Coloured scanning electron micrograph of surface of prostate cancer cells. — Stock Photo
    Coloured scanning electron micrograph of surface of prostate cancer cells.
    Components of house dust — Stock Photo
    Components of house dust
    Scanning electron micrograph of Brevibacteria on human feet causing odour. — Stock Photo
    Scanning electron micrograph of Brevibacteria on human feet causing odour.
    Electron micrograph of Bacteria and yeast — Stock Photo
    Electron micrograph of Bacteria and yeast
    Colored scanning electron micrograph of breast cancer cell. — Stock Photo
    Colored scanning electron micrograph of breast cancer cell.
    Colored scanning electron micrograph of stem cell-derived motor neuron cell. — Stock Photo
    Colored scanning electron micrograph of stem cell-derived motor neuron cell.
    Triceratium sp. diatom algae — Stock Photo
    Triceratium sp. diatom algae
    Kidney glomerulus and podocyte cells — Stock Photo
    Kidney glomerulus and podocyte cells