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    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.
    Gall bladder. Coloured scanning electron micrograph (SEM) of the surface of a gall bladder. This mucosa lining is made up of cuboidal epithelial cells (yellow) — 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 (yellow)
    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.
    Campylobacter jejuni bacteria — Stock Photo
    Campylobacter jejuni bacteria
    Osteoporotic bone abnormality — Stock Photo
    Osteoporotic bone abnormality
    Cardiac muscle from a healthy heart — Stock Photo
    Cardiac muscle from a healthy heart
    Mycobacterium smegmatis bacteria — Stock Photo
    Mycobacterium smegmatis bacteria