Growth of Male Reproductive Organs with Observation of their Seasonal Morphologic Changes in the Japanese Monkey (Macaca fuscata)
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Changes in weight and histological figures of the testes, epididymides, seminal vesicles and prostate glands of the Japanese monkey were studied according to age and season. The weight of testis and accessory sex organs began to increase markedly from the age around puberty and continued to increase until about 10 years of age. The weight of reproductive organs, except the epididymis, differed significantly between the breeding season and the non-breeding season in mature males. Histological parameters, such as the diameter of seminiferous tubules, the number of pachytene spermatocytes, the tubular diameter and height of epithelium of epididymis and the cellular height of glandular epithelium of seminal vesicle and prostate gland, all exhibited conspicuous in-creases from the age around puberty to about 10 years. The first appearance of sperm in seminiferous tubules was in the breeding season at 3 or 4 years of age. In the breeding season, epithelial cells of the seminal vesicles and prostate glands extended from the epithelial base to the lumen, showing their active secretory phase. Those in the non-breeding season decreased in height, suggesting their inactive secretory phase.
- 公益社団法人 日本獣医学会の論文
公益社団法人 日本獣医学会 | 論文
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