ANATOMY

Detailed explanation-1: -Testosterone is a hormone that is responsible for many of the physical characteristics specific to adult males. It plays a key role in reproduction and the maintenance of bone and muscle strength.

Detailed explanation-2: -At puberty, the testes increase testosterone production. Testosterone causes reproductive organs to mature, muscle and bone to grow, facial and pubic hair to appear, and the voice to deepen.

Detailed explanation-3: -Testosterone is a sex hormone that plays important roles in the body. In men, it’s thought to regulate sex drive (libido), bone mass, fat distribution, muscle mass and strength, and the production of red blood cells and sperm. A small amount of circulating testosterone is converted to estradiol, a form of estrogen.

Detailed explanation-4: -Testosterone is the hormone that causes boys to develop deeper voices, bigger muscles, and body and facial hair. It also stimulates the production of sperm.

Detailed explanation-5: -The testicles produce testosterone. Testosterone triggers the development of the male internal and external reproductive organs during fetal development.