Spermatogenesis is the complex process of sperm cell development, starting from the division of spermatogonia and culminating in the formation of mature spermatozoa. This process occurs within the seminiferous tubules of the testes and involves several stages, including mitosis, meiosis, and spermiogenesis.
In normal asynchronous spermatogenesis (A), a wave is generated as the retinoic acid pulses (red patches) move along the tubules driving the A to A1 transition of spermatogonia. Only stages VIII and IX are shown. In synchronous spermatogenesis (B), no wave is generated and the entire testis moves through the cellular associations at the same
A spermatogonium ( pl.: spermatogonia) is an undifferentiated male germ cell. Spermatogonia undergo spermatogenesis to form mature spermatozoa in the seminiferous tubules of the testis . There are three subtypes of spermatogonia in humans: Type A (dark) cells, with dark nuclei.
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