Spermatogenesis Formation of human sperm from primitive germ cell -75 days
1 spermatogonium (primitive germ cell next to the basal lamina of the seminiferous tubules) mature into primary spermatocytes during adolescence
meiosis, haploid number of chromosomes, testosterone - secondary spermatocytes
spermatids - maturing in deep folds of Sertoli cell cytoplasm; FSH
512 mature sperms (spermatozoa) released from Sertoli cells