Variation according to age of the fatty substance in the testes of swine
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概要
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The result of the observation of the fatty sub stance in the testes of 31 healthy hogs from birth to 4 years 10 months is as follows:(1) The fatty substance observed in the testes of swine is a neutral fat and a sort of lipoid, which turns pale yellow or scarlet at Sudan III staining, possitive at SMITH-DIETRICH Method, and obscure at FISCHLER Method.(2) The fatty substance in seminiferous tubules appears in different possitions according to age. It is present, in its early stage, in the central part of seminiferous tubules. In the stage when the weight of the testes is about 10g. or more (73 days of age or older), the diameter of the seminiferous tubules is approximately 80μ or longer, and the seminiferous tubules which show the reduction of spermatocyte increases, or when spermatid appears in part, the fatty substance begins to lie in a layer on the margin of seminiferous tubules, forming the so-called Fettrandzone; and those existed in the central part disappears gradually. And after the spermatozoa has been presented a layer of fatty globules in fine powder state in the sperm-formation-layer, too, forming the two layers within and out with the above described marginal fatty layer. And this figure can be distinctly observed after 5 months of age.(3) The fatty substance in the interstitial tissue which is present since birth increases in those of above 5 months of age when the spermatogenesis becomes active and the growth of the spermatozoa of cauda epididymis gets remarkable.
- 公益社団法人 日本畜産学会の論文
公益社団法人 日本畜産学会 | 論文
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