Hormonal control of male reproductive system

2. Anterior pituitary secretes two Gonandotrophins :

(a) Follicular Stimulating Hormone (FSH). It stimulates spermatogenesis in the germ cells of seminiferous tubules of testis so produces haploid and motile male gametes, called spermatozoa, so is also called gametokinetic hormone.

Hormonal control of male reproductive system

(b) Interstitial Cells Stimulating Hormone (ICSH). It stimulates interstitial cells to secrete male sex hormone called testosterone.

3. Sertoli cells secrete Androgen binding protein (ABP) which concentrates testosterone in the seminiferous tubules.

4. Testosterone hormone secreted by interstitial or Leydig’s cells of testes. It regulates secondary sex organs and secondary sexual characters. It regulates the growth, maintenance and functioning of secondary sex organs like epididymis, vasa deferentia, prostate gland, seminal vesicles, penis etc.

Testosterone also stimulates the development of male secondary sexual characters like appearance of facial hair, deepening of voice, broadening of shoulders, elongation of bones and increase in height.