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    Colored scanning electron micrograph of osteosarcoma bone cancer cell. — Stock Photo
    Colored scanning electron micrograph of osteosarcoma bone cancer cell.
    Immature dog sperm — Stock Photo
    Immature dog sperm
    Plaque-forming bacteria — Stock Photo
    Plaque-forming bacteria
    Escherichia coli bacteria — Stock Photo
    Escherichia coli bacteria
    Human silhouette with Pneumocystis pneumonia and close-up of fungus spores. — Stock Photo
    Human silhouette with Pneumocystis pneumonia and close-up of fungus spores.
    Dog tapeworm head — Stock Photo
    Dog tapeworm head
    Illustration of fruiting bodies and hyphae of fungus Aspergillus fumigatus. — Stock Photo
    Illustration of fruiting bodies and hyphae of fungus Aspergillus fumigatus.
    Osteoblasts. Colored transmission electron micrograph (TEM) of osteoblasts, bone-producing cells (purple and pink). They contain rough endoplasmic reticulum (RER), which produces, modifies and transports proteins, and nucleus — Stock Photo
    Osteoblasts. Colored transmission electron micrograph (TEM) of osteoblasts, bone-producing cells (purple and pink). They contain rough endoplasmic reticulum (RER), which produces, modifies and transports proteins, and nucleus
    Carcinoma cell, coloured transmission electron micrograph (TEM). — Stock Photo
    Carcinoma cell, coloured transmission electron micrograph (TEM).
    Coloured scanning electron micrograph of bacteria cultured from mobile phone. — Stock Photo
    Coloured scanning electron micrograph of bacteria cultured from mobile phone.
    Breast cancer cells growing in culture — Stock Photo
    Breast cancer cells growing in culture
    Stick insect foot — Stock Photo
    Stick insect foot
    Blood clotting in an ovarian follicle — Stock Photo
    Blood clotting in an ovarian follicle
    Normal skull structure of young adult — Stock Photo
    Normal skull structure of young adult
    Neutrophil cells. Coloured transmission electron micrograph (TEM) of human neutrophil cells. Neutrophils are involved in inflammatory responses to tissue damage, where they engulf and destroy microorganisms — Stock Photo
    Neutrophil cells. Coloured transmission electron micrograph (TEM) of human neutrophil cells. Neutrophils are involved in inflammatory responses to tissue damage, where they engulf and destroy microorganisms
    Mycobacterium smegmatis bacteria — Stock Photo
    Mycobacterium smegmatis bacteria
    Coloured scanning electron micrograph (SEM) of a fractured bile duct. — Stock Photo
    Coloured scanning electron micrograph (SEM) of a fractured bile duct.
    Shoulder and elbow joints anatomy — Stock Photo
    Shoulder and elbow joints anatomy
    Bacillus megaterium bacterial colony, coloured scanning electron micrograph. — Stock Photo
    Bacillus megaterium bacterial colony, coloured scanning electron micrograph.
    Composite image of nasal epithelium and pollen. Coloured Scanning Electron Micrograph (SEM) of the surface of nasal epithelium with inhaled in pollen. — Stock Photo
    Composite image of nasal epithelium and pollen. Coloured Scanning Electron Micrograph (SEM) of the surface of nasal epithelium with inhaled in pollen.
    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
    Digital illustration of pollen grains on anther of Chinese hibiscus flower. — Stock Photo
    Digital illustration of pollen grains on anther of Chinese hibiscus flower.
    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
    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
    Brain with aneurysm in the middle cerebral artery — Stock Photo
    Brain with aneurysm in the middle cerebral artery
    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.
    Stagnant water bacteria — Stock Photo
    Stagnant water bacteria
    Mycobacterium smegmatis bacteria — Stock Photo
    Mycobacterium smegmatis bacteria
    Pancreatic cancer cells — Stock Photo
    Pancreatic cancer cells
    Normal elbow joint anatomy — Stock Photo
    Normal elbow joint anatomy
    Crypts of Lieberkuhn. Light micrograph (LM). Crypts of Lieberkuhn of the colon shown in cross section. Crypts are long blind-ending tube-like extensions of the surface epithelial lining of the gut — Stock Photo
    Crypts of Lieberkuhn. Light micrograph (LM). Crypts of Lieberkuhn of the colon shown in cross section. Crypts are long blind-ending tube-like extensions of the surface epithelial lining of the gut
    Normal skull structure of young adult — Stock Photo
    Normal skull structure of young adult
    Colored scanning electron micrograph of Streptococcus mutans anaerobic bacteria in normal bacteria flora of mouth. — Stock Photo
    Colored scanning electron micrograph of Streptococcus mutans anaerobic bacteria in normal bacteria flora of mouth.
    Activated blood cell fragments platelets, coloured scanning electron micrograph. — Stock Photo
    Activated blood cell fragments platelets, coloured scanning electron micrograph.
    Coloured scanning electron micrograph of breast cancer cell. — Stock Photo
    Coloured scanning electron micrograph of breast cancer cell.
    Streptomyces coelicoflavus bacteria — Stock Photo
    Streptomyces coelicoflavus bacteria
    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.
    Coloured scanning electron micrograph of breast cancer cells. — Stock Photo
    Coloured scanning electron micrograph of breast cancer cells.
    Tumour affecting the pituitary gland — Stock Photo
    Tumour affecting the pituitary gland
    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).
    Angel trumpets pollen — Stock Photo
    Angel trumpets pollen
    Cardiac muscle from a healthy heart — Stock Photo
    Cardiac muscle from a healthy heart
    Bird bone tissue — Stock Photo
    Bird bone tissue
    Fat cell. Coloured scanning electron micrograph (SEM) of part of a fat-storing cell (adipocytes). Fat cells are one of the largest cell types in the human body, each cell being 100 to 120 microns in diameter — Stock Photo
    Fat cell. Coloured scanning electron micrograph (SEM) of part of a fat-storing cell (adipocytes). Fat cells are one of the largest cell types in the human body, each cell being 100 to 120 microns in diameter
    Coloured scanning electron micrograph intricately structured microscopic brochosomes granules secreted by leafhopper. — Stock Photo
    Coloured scanning electron micrograph intricately structured microscopic brochosomes granules secreted by leafhopper.
    Coiled proboscis of a moth — Stock Photo
    Coiled proboscis of a moth
    Coloured scanning electron micrograph of ovarian cancer cells. — Stock Photo
    Coloured scanning electron micrograph of ovarian cancer cells.
    Coloured scanning electron micrograph of bacteria cultured from mobile phone. — Stock Photo
    Coloured scanning electron micrograph of bacteria cultured from mobile phone.
    Taste buds. Coloured light micrograph of a section through the tongue, showing taste buds (round, purple). The taste buds are within papillae (projections) located on the surface of the tongue — Stock Photo
    Taste buds. Coloured light micrograph of a section through the tongue, showing taste buds (round, purple). The taste buds are within papillae (projections) located on the surface of the tongue
    Skimmia sp. pollen grain — Stock Photo
    Skimmia sp. pollen grain
    Sarcoptic mange mites eggs — Stock Photo
    Sarcoptic mange mites eggs
    Scanning electron micrograph of bacterial culture from sputum. — Stock Photo
    Scanning electron micrograph of bacterial culture from sputum.
    Surface of a fallopian tube — Stock Photo
    Surface of a fallopian tube
    Kidney glomerulus and podocyte cells — Stock Photo
    Kidney glomerulus and podocyte cells
    Bacillus megaterium bacterial colony, coloured scanning electron micrograph. — Stock Photo
    Bacillus megaterium bacterial colony, coloured scanning electron micrograph.
    Human hair Caucasian brunette, coloured scanning electron micrograph. — Stock Photo
    Human hair Caucasian brunette, coloured scanning electron micrograph.
    Normal blood vessels, X-ray — Stock Photo
    Normal blood vessels, X-ray
    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
    Villi from the lining of the jejunum — Stock Photo
    Villi from the lining of the jejunum
    Osteoarthritis of the hip — Stock Photo
    Osteoarthritis of the hip