seminiferous tubules


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Related to seminiferous tubules: Interstitial cells, seminal vesicle

sem·i·nif·er·ous tu·bules

one of two to four twisted, curved tubules in each lobule of the testis, in which spermatogenesis occurs.

seminiferous tubules

The many, long, coiled-up, fine tubes, hundreds of which are present in each testicle and are said to total in length over 400 m. The spermatozoa develop from cells in the walls of these tubules.

seminiferous tubules

coiled tubules in which SPERMATOGENESIS takes place in the testes of male vertebrates. They are made up of germinal epithelium and hundreds are present in each testis. The germ epithelium proliferates, forms spermatogonia and grows into spermatocytes which give rise to spermatids by GAMETOGENESIS. The spermatids mature to spermatozoa embedded in nutritive SERTOLI CELLS.
References in periodicals archive ?
The GCNIS-derived tumors share a number of features in addition to the usual presence of GCNIS in the seminiferous tubules of the residual parenchyma.
The values of primary testis volume, absolute Cavalieri testis volume, the volume of seminiferous tubule epithelium and lumen, the significant increase (P=0.008) in the total number of Leydig cells compared to the control group.
Testis of rat from group 2 showing the abnormal histological structures of seminiferous tubules both germ cells and seminiferous epithelia vacuolation.
Table 2--Mean values and standard deviation of the diameter of the seminiferous tubules epithelial cells ([micro]m) of goats poisoned by Ipomoea brasiliana.
MNGCs are one of the most specific and common indicators of seminiferous tubule (ST) degeneration in testicular toxicity studies.
Photomicrographs of the cross-sections of seminiferous tubules represent the stages of spermatogenesis of seminiferous epithelium: spermatogonia type A (short arrows), primary spermatocytes at the pachytene stage (long arrows), spermatids at the zygotene stage (ellipse area) and spermatozoa (rectangular area).
Immunohistochemical methods were performed to determine the location and distribution of proteins in spermatogenic cells in seminiferous tubules (29).
In the seminiferous tubules, there were one to three layers of myoid cells surrounding the basement membrane, fewer than in the mammalian testes (Wang et al., 2011); this suggests that the ability to secrete sperm is relatively low in the African ostrich testes.
Faria et al., "Morphology and Morphometry of Seminiferous Tubules in Crioulo Horses," Journal of Equine Veterinary Science, vol.
As for empty spaces in the seminiferous tubules in slides of four groups, they may be artificial due to embedding processing of the tissues.
In the analyzed species, the seminiferous tubules were connected and characterize the testis as of anastomosing tubular type, a plesiomorphic morphological character present in bonefish (Parenti & Grier, 2004).
The mean diameter of seminiferous tubules of testes was 218.26 +- 7.45um in group A, 123.96+-11.84 in group B and 180.86+-12.13 in group C (p<0.001).