Sertoli Cells

Sertoli cells constitute the true epithelium of the seminiferous epithelium

Sertoli cells (sustentacula^' cells) are tall, columnar, nonreplicating epithelial cells that rest on the thick, mul-tilayered basal lamina of the seminiferous epithelium (Fig. 21.15). They are the supporting cells for the devel-

spermatogonium spermatogonium pachytene spermatocyte leptotene spermatocyte

type A dark type A pale spermatogonium spermatogonium

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