Structure of the glandular layer and koilin membrane in the gizzard of the adult domestic fowl (Gallus gallus domesticus).


The koilin membrane is formed by the secretions of gland, crypt and surface epithelial cells. Glands form a continuous layer and are arranged in groups of 10-20. They are straight tubes about 500 microns long and 15 microns in diameter and produce rodlets of hard koilin. Hard koilin rodlets (5 microns diameter) form clusters of five or six as they pass… (More)


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