Age-related changes in the seminal vesicles of a Brazilian (Nelore) zebu
作者:
F.M. Cardoso,
H.P. Godinho,
J.C. Nogueira,
期刊:
Cells Tissues Organs
(Karger Available online 1979)
卷期:
Volume 103,
issue 3
页码: 327-335
ISSN:1422-6405
年代: 1979
DOI:10.1159/000145031
出版商: S. Karger AG
关键词: Citric acid;Zebu;Seminal vesicles;Male genital system;Age changes;Fructose
数据来源: Karger
摘要:
Age changes in the structure of the seminal vesicles and in the rate of production of fructose and citric acid have been studied in a Brazilian (Nelore) zebu, from the fetal period to 36 months of age. At 3 and 6 months, the microscopic anatomy of the gland resembled that of the fetus; the tubules of the seminal vesicles had a reduced diameter and a low epithelial layer; only a few presented traces of secretion, and tissue contents of fructose and citric acid were accordingly low. At 12 months, the tubules were more ramified and had a larger diameter. In the 18-month-old animals the seminal vesicles presented substantial modifications; the tubules were large, with irregular lumina and surrounded by narrow stroma, the epithelial layer was higher than that of previous stages and its columnar cells had nuclei located basally. Tissue levels of fructose increased rapidly between 12 and 18 months. At 24 months, the seminal vesicles had reached the adult condition characterized by intense proliferation of tubules with irregular lumina and abundant secretory material. Numerous dark columnar cells were found in the epithelium. Seminal vesicles of Nelore zebus contain less fructose and citric acid than those of taurine bulls of comparable age.
点击下载:
PDF
(1178KB)
返 回