Answer:
Testes
Explanation:
Spermatogenesis is the process by which haploid mature spermatozoa is produced from diploid germ cells through meiosis and cell differentiation in the male reproductive organ, TESTIS. Spermatogenesis is one of the forms of gametogenesis that occurs in males, as the other (oogenesis) occurs in females.
The testes are composed of numerous thin, tightly coiled tubules known as the SEMINIFEROUS TUBULES, whose wall the production of sperm takes place.
The process of spermatogenesis begins when diploid germ cells called Spermatogonia, undergoes mitotic division to produce two identical daughter cells. One of these cells (A-spermatogonium) will be used to replenish the pool of spermatogonia i.e ensure that the male is fertile throughout his adult life, while the other (B-spermatogonium) will eventually form the mature sperm cell.
This B-spermatogonium replicates by undergoing mitosis to form identical cells known as Primary spermatocyte. The primary spermatocytes undergo meiosis I to produce two haploid cells called secondary spermatocytes. These two cells undergo meiosis II to produce a total of four haploid cells called Spermatids.
N.B: This series of mitotic and meiotic divisions is called Spermatocytogenesis.
The Spermatids are released into the lumen of the seminiferous tubules from the seminiferous epithelium, a process known as Spermiation. In the seminiferous tubules, the spermatids undergo series of metarmophic change and differentiation into mature spermatozoa, until they reach the epididymis. This structural change, where the spermatids undergo nuclear condensation, formation of acrosomal cap and development of a tail, is known as Spermiogenesis.
The spermatozoa becomes stored in the epididymis and undergoes further maturation.
