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  • Title: Studies on the ultrastructure of the Fallopian tube: Part II. Changes in the secretory cells of the rabbit Fallopian tube during ovum transport.
    Author: Bajpai VK, Shipstone AC, Gupta DN, Karkun JN.
    Journal: Indian J Exp Biol; 1974 Mar; 12(2):123-32. PubMed ID: 4435842.
    Abstract:
    The ultrastructural changes that occur in the ciliated cells of the tubal epithelium of the adult rabbit during ovum transport were previously reported. In this communication, the changes that occur in the secretory cells of the tube under identical conditions are described. Estrous and pregnant rabbits were used. 14-70 hours postcoitum the size and shape of the microvilli of the ampullar cells differed from the isthmic ones. The prominence of the microvilli was roughly correlated with the possible arrival of the ovum in any part of the tube. The secretory granules in the cells of the ampulla were more electron dense than those in the isthmus. With the progress of the post ovulatory period, the secretory granules changed in nature and location. During the postovulatory period, the secretory process in both parts of the tube indicate a "merocrine" type of secretion. A cilium was occasionally present in the luminal epithelium of a secretory cell. Hybrid cells may arise when a cell malfunctions while receiving a set of messages from the nucleus at the time appropriate for cell differentiation.
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