MICROANATOMY

Detailed explanation-1: -For guys, these hormones travel through the blood and give the testes the signal to begin the production of testosterone and sperm. Testosterone is the hormone that causes most of the changes in a guy’s body during puberty.

Detailed explanation-2: -The main hormone secreted by the testes is testosterone, an androgenic hormone. Testosterone is secreted by cells that lie between the seminiferous tubules, known as the Leydig cells.

Detailed explanation-3: -The testes synthesize two essential products: testosterone, needed for the development and maintenance of many physiological functions including normal testis function; and sperm, needed for male fertility.

Detailed explanation-4: -Testosterone is produced by the gonads (by the Leydig cells in testes in men and by the ovaries in women), although small quantities are also produced by the adrenal glands in both sexes. It is an androgen, meaning that it stimulates the development of male characteristics.

Detailed explanation-5: -At puberty the hypothalamic pituitary unit begins to function like that of an adult. The hypothalamus begins to secrete increased amounts of gonadotropin-releasing hormone or GnRH in a pulsatile manner and the pituitary responds by secreting increased amounts of gonadotropins, FSH and LH in a pulsatile manner.