週令経過にともなうニワトリ精管の組織変化

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This investigation is concerned with histological observation of deferent ducts of roosters during their growing period of 4 to 26 weeks after hatching. The results are as follows.In a rooster 4 weeks after hatching, the epithelia of the deferent duct were composed of a single layer of cuboidal and columnar cells, and a few round or oval cells adjacent to the basement membrane. In the ducts 6 to 8 weeks after hatching, the epithelial cells grew to form a few layers and lumps of elongated cells, considered to be a transformation of proliferated cells, were found in places on top of the layers. In deferent ducts 8 weeks after hatching, the elongated cells got transformed into rod-like cells and projected into the lumen. It seemed that those rod-like cells fell off into the lumen finally to disappear, while the round cells adjacent to the basement membrane increased in number and were arranged along the membrane. Such phenomenon was observed in the ducts 10 weeks after hatching. After this period, the epithelia of deferent ducts became pseudo-stratified, while most of the round cells adjacent to the basement membrane tended to be atrophied. The rod-like cells located among the pseudo-stratified cells decreased gradually with aging. It was observed that deferent ducts of mature roosters had pseudo-stratified epithelia. Secretion from the epithelial cells appeared in the lumen, from 10 weeks after hatching on. The lumen of a deferent duct came to be enlarged 10 weeks after hatching, and a large number of spermatozoa were stored in the lumen. The thickness of the muscular layer, thicker in the lower portion of the duct than in the upper and middle portions, did not change with aging.
社団法人日本畜産学会の論文

週令経過にともなうニワトリ精管の組織変化

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