论文部分内容阅读
睾丸主要有产生精子和睾酮（T）两大功能。精子的发生场所为曲精小管，睾酮则是由睾丸间质细胞合成和分泌。1精子的发生精原细胞位于曲精小管的基膜上，为不成熟的精细胞。精原细胞经过几次有丝分裂产生大量的细胞，再以初级精母细胞进入减数分裂。有丝分裂也使干细胞（精原细
Testicles mainly produce sperm and testosterone (T) two major functions. Sperms occur at the seminiferous tubule, testosterone is synthesized and secreted by the testicular stromal cells. Spermatogenesis spermatogonia is located in the basement membrane of the seminiferous tubules, immature sperm cells. Spermatogonial cells after several mitosis produce a large number of cells, and then into the primary spermatocytes meiosis. Mitosis also makes stem cells (spermatogonia