Page 799 - Atlas of Histology with Functional Correlations

FIGURE 20.4 ■ Peripheral section of the testis (sectional view). Stain:
hematoxylin and eosin. Low magnification.

FIGURE 20.5 | Testis: Seminiferous Tubules

(Transverse Section)

This photomicrograph illustrates a seminiferous tubule (5) and adjacent
seminiferous tubules lined by a thick germinal epithelium.

The dark type A (1a) and the pale type B (1b) spermatogonia (1) are

located at the base of the tubule. The primary spermatocytes (2) and
spermatids (7) in different stages of maturation are embedded in the germinal
epithelium closer to the lumen. The tails of the developing spermatids (7)

protrude into the lumen of the seminiferous tubules (5). The supportive Sertoli
cells (6) are prominent and located throughout the germinal epithelium.

Each seminiferous tubule (5) is surrounded by a fibromuscular interstitial
connective tissue (3) that also contains the testosterone-secreting interstitial
cells (4).

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