The male reproductive system consists of a group of internal and external organs. The internal organs are Vas deferens, ejaculatory ducts, prostate gland, urethra and seminal vesicles. The external organs which are located on the exterior part of the body are the penis, testes, scrotum and epididymis.
Testosterone is a male reproductive hormone that is produced in the adrenal gland and Leydig cells of the testes. The synthesis of testosterone is regulated by the endocrine hormones. The testosterone functions in the development of body and facial hairs, voice change, body and muscle strength and made, sexual drive, fat distribution and enlargement of genitals.
Follicle-stimulating hormone is produced by the pituitary gland which is found at the base of the brain. The follicle-stimulating hormone controls spermatogenesis (the process of sperm production and maturation).
Luteinizing hormone is produced by the pituitary gland which is located at the base of the brain. The production of luteinizing hormone is stimulated by hypothalamic gonadotropin-releasing hormone. Luteinizing hormone is transported in the bloodstream to the testes where it stimulates Leydig cells to stimulate the synthesis and secretion of testosterone and androgen.