OpenStax College, Human Reproductive Anatomy and Gametogenesis.
License: CC BY-SA: Attribution-ShareAlike Located at: en./wiki/seminiferous_tubule. During adolescence, gonadotropic hormones from the anterior pituitary cause the activation of these cells and the production of viable sperm. Stem cells are deposited during gestation and are present at birth through the beginning of adolescence, but in an inactive state. Four sperm result from each primary spermatocyte that goes through meiosis. When it reaches the lumen of the tubule and grows a flagellum (or “tail”), it is called a sperm cell. The cell produced at the end of meiosis is called a spermatid. This haploid cell must go through another meiotic cell division. At the end of the first meiotic division, a haploid cell is produced called a secondary spermatocyte. Meiosis begins with a cell called a primary spermatocyte. \): Spermatogenesis: During spermatogenesis, four sperm result from each primary spermatocyte, which divides into two haploid secondary spermatocytes these cells will go through a second meiotic division to produce four spermatids.
