seminiferous tubule


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Related to seminiferous tubule: Sertoli cells, spermatogenesis

seminiferous tubule

n.
One of two or three twisted, curved tubules in each lobule of the testis in which spermatozoa develop.

sem·i·nif·er·ous tu·bule

(sem'i-nif'ĕr-ŭs tū'byūl)
One of two or three twisted, curved tubules in each lobule of the testis, in which spermatogenesis occurs.
Synonym(s): tubuli seminiferi recti [TA] , convoluted seminiferous tubule, tubuli contorti (2) .

seminiferous tubule

One of the very small channels of the testes in which spermatozoa develop and through which they leave the testes. These tubules may be either straight or convoluted.
See also: tubule
References in periodicals archive ?
Ameliorative effects of curcumin on the structural parameters of seminiferous tubules and Leydig cells in metronidazole-treated mice: a stereological approach.
(A) Seminiferous tubules of control group with normal conjoined germinative epithelial cells and spermatozoa in the lumen.
The data indicated the significantly higher percentage of seminiferous tubules containing MNGCs in the AA-treated group than in the AA+L-cys-treated group (p<0.001), as shown in Table 3.
The results of the microscopic examination showed no clear difference between the densities of spermatogonia type A, primary spermatocytes at the pachytene stage, spermatids at the zygotene stage and spermatozoa in the seminiferous tubules of vaccinated (Figure 2Ba) and control lambs (Figure 2Bb) at week 30 after the primary immunization.
The low expression rate of CDC25A in infertile men is the result of the reduction of spermatogenic cycles in the seminiferous tubules and shows that the CDC25 phosphatase contributes to the hyperphosphorylation of M-phase promoting factor (MPF) and CDC25 that are important to complete the meiosis (24).
The positive cells in the tubular compartments were distributed in the spermatogenic cells and Sertoli cells of the seminiferous tubules (Fig.
In contrast to primates, for example, marmosets, two or more cellular associations (stages of seminiferous epithelium) were identified from a cross section of the seminiferous tubule [18], because spermatogenesis as in marmoset is asymmetrically distributed, resulting in more than one stage per cross section of seminiferous tubule [20].
During the current investigation, the histological examination of testis showed no statistically significant difference in the mean diameters of the seminiferous tubules among various groups.
[7] also studied the germ cells but did not study the seminiferous tubule structure.
We used a rat seminiferous tubule culture model mimicking the in vivo situation in the pubertal rat (Staub et al., 2000).
In mammalian testis Spermatogenesis takes place in the seminiferous tubules which are composed of Sertoli cells (SCs) and maturing germ cells surrounded by one (rodents) or more (large animals) layer(s) of peritubular myoid cells [8,9].