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    Stomach lining structure, computer illustration. — Stock Photo
    Stomach lining structure, computer illustration.
    Digital illustration of human cilia cells. — Stock Photo
    Digital illustration of human cilia cells.
    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.
    Rendering of gastric ulcer — Stock Photo
    Rendering of gastric ulcer
    Stomach lining. Coloured light micrograph (LM) of the stomach. The lumen is at top (white). The surface of the mucosa consists of simple columnar cells that secrete mucus — Stock Photo
    Stomach lining. Coloured light micrograph (LM) of the stomach. The lumen is at top (white). The surface of the mucosa consists of simple columnar cells that secrete mucus
    Light micrograph of a buccal mucosa cell. This cell lines the cheeks and the back of the lips. — Stock Photo
    Light micrograph of a buccal mucosa cell. This cell lines the cheeks and the back of the lips.
    Rendering of gastric ulcer — Stock Photo
    Rendering of gastric ulcer
    Medical ilustration of gallstones in the gallbladder and the cholecystectomy — Stock Photo
    Medical ilustration of gallstones in the gallbladder and the cholecystectomy
    Medical illustration of intestinal villi in tract. — Stock Photo
    Medical illustration of intestinal villi in tract.
    Digital illustration of human cilia cells. — Stock Photo
    Digital illustration of human cilia cells.
    Anatomy of the structure and layers of the stomach wall — Stock Photo
    Anatomy of the structure and layers of the stomach wall
    Illustration of colon inflammation caused by gluten. — Stock Photo
    Illustration of colon inflammation caused by gluten.
    Digital illustration of human cilia cells. — Stock Photo
    Digital illustration of human cilia cells.
    Peripheral nerve. Coloured transmission electron micrograph (TEM) of a section through a small peripheral nerve. Myelin( brown) is an insulating fatty layer that surrounds the myelinated nerve fibres (cyan) — Stock Photo
    Peripheral nerve. Coloured transmission electron micrograph (TEM) of a section through a small peripheral nerve. Myelin( brown) is an insulating fatty layer that surrounds the myelinated nerve fibres (cyan)
    Medical illustration of gall bladder ganglion anatomy — Stock Photo
    Medical illustration of gall bladder ganglion anatomy
    Trachea lining. Coloured transmission electron micrograph (TEM) of a longitudinal section through the lining of the trachea (windpipe), which links the larynx (voicebox) to the lungs — Stock Photo
    Trachea lining. Coloured transmission electron micrograph (TEM) of a longitudinal section through the lining of the trachea (windpipe), which links the larynx (voicebox) to the lungs