What is spermatogenesis? Briefly describe the process of spermatogenesis.

Explanation

During puberty, in the testis the immature male germ cells, spermatogonia produce sperms by spermatogenesis. The spermatogonial stem cells in seminiferous tubules multiply by repeated mitotic divisions and develops into primary spermatocytes with 46 chromosomes. A primary spermatocyte undergoes first meiotic division to produce 2 equal sized haploid secondary spermatocyte. which have only 23 chromosomes. These undergo second meotic division to produce four haploid spermatidis. which inturn transform into. spermatozoa (sperms) by the process called spermoigenesis. After spermiogenesis, sperm heads become embedded is Sertoli cells, and are finally released from the seminiferous tubules by the process .spermiation..
Spermatogenesis starts at the age of At Puberty puberty due to increase in the secretion of 1 Spermatogonia 1 Mitosis gonadotropin releasing hormone (GnRH), produced from hypothalamus. The increased Primary spermatocytes levels of GnRH inturn stimulates pituitary gland 18 meiotic division to produce two gonadotropins.
a) Lutenising Hormone (LH)
b) Follicular Stimulating Hormone (FSH) 2 meiotic division LH acts on Leydig cells and stimulates Spermatids the secretion of androgens. Androgens Differentiation inturn stimulate the process of spermatogenesis. FSH acts on Sertoli cells and Spermatozoa stimulates secretion of some factors which help in the process of Spermio - genesis.