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    Coloured scanning electron micrograph (SEM) of a fractured mucous membrane of the trachea (wind pipe), showing the epithelium and underlying connective tissue. — Stock Photo
    Coloured scanning electron micrograph (SEM) of a fractured mucous membrane of the trachea (wind pipe), showing the epithelium and underlying connective tissue.
    Destruction of a cancer cell by antibodies — Stock Photo
    Destruction of a cancer cell by antibodies
    Abstract animal cells, digital illustration. — Stock Photo
    Abstract animal cells, digital illustration.
    Illustration of eosinophil white blood cell with purple lobed nuclei. — Stock Photo
    Illustration of eosinophil white blood cell with purple lobed nuclei.
    Cultured cancer cells — Stock Photo
    Cultured cancer cells
    Human Fertilisation, computer illustration — Stock Photo
    Human Fertilisation, computer illustration
    Carcinoma cell, coloured transmission electron micrograph (TEM). — Stock Photo
    Carcinoma cell, coloured transmission electron micrograph (TEM).
    Nerve cells and axon connections — Stock Photo
    Nerve cells and axon connections
    Adipose tissue composed of adipocytes — Stock Photo
    Adipose tissue composed of adipocytes
    Structure and shape of basophil — Stock Photo
    Structure and shape of basophil
    Ovarian cancer cells, coloured scanning electron micrograph. — Stock Photo
    Ovarian cancer cells, coloured scanning electron micrograph.
    Fallopian tube cellular structure — Stock Photo
    Fallopian tube cellular structure
    Neutrophil white blood cell in blood, digital artwork. — Stock Photo
    Neutrophil white blood cell in blood, digital artwork.
    Structure of white blood cell — Stock Photo
    Structure of white blood cell
    Finger-like projections of the duodenum — Stock Photo
    Finger-like projections of the duodenum
    Breast cancer cells growing in culture — Stock Photo
    Breast cancer cells growing in culture