In humans, at the end of the first meiotic division, the male germ cells form
This process commences with the spermatogonia that lie adjacent to the basement membrane of the tubules and divide by mitosis.
Spermatogonia, as well as renewing themselves, give rise to cells that lose contact with the basement membrane and commence the process of meiosis, now called primary spermatocytes. Having completed the first meiotic division, these cells give rise to daughter cells called secondary spermatocytes, which divide to complete meiosis to form round spermatids.
The round spermatids do not divide but undergo a complex metamorphosis, called spermiogenesis to become spermatozoa that are released into the lumen of the semeniferous tubule by a process called spermiation.