Testosterone functions of the testis.. Maturation of organs of the reproductive system and the appearance of secondary sexual characteristics

Testosterone, which is produced by the testis, works on:
* Maturation of organs of the reproductive system.
* The emergence of manifestations of puberty in the male (secondary sexual characteristics) such as:
- Coarse sound.
- Growth of armpit hair, pubic, chin, mustache.
- Muscle growth.