What is Spermatogenesis?

(a) Mitosis of a spermatogonial stem cell involves a single cell division that results in two identical, diploid daughter cells (spermatogonia to primary spermatocyte). Meiosis has two rounds of cell division: primary spermatocyte to secondary spermatocyte, and then secondary spermatocyte to spermatid. This produces four haploid daughter cells (spermatids). (b) In this electron micrograph of … Continue reading What is Spermatogenesis?

The Testes

This sagittal view shows the seminiferous tubules, the site of sperm production. Formed sperm are transferred to the epididymis, where they mature. They leave the epididymis during an ejaculation via the ductus deferens. Source: OpenStax Anatomy and Physiology OpenStax Anatomy and Physiology The testes (singular = testis) are the male gonads—that is, the male reproductive … Continue reading The Testes