Osmosis video - Testosterone

Testosterone is the primary male sex hormone and an anabolic steroid. In men, it plays a key role in the development of male reproductive tissue and secondary sexual characteristics. It is produced mainly in the testes and is responsible for several functions, including sexual differentiation during fetal life, and the development of primary sexual characteristics like an enlarged penis and testes, as well as secondary characteristics like a male pattern of hair growth, voice changes, and various anabolic effects.