Endocrine function of the testes
maturation of internal genitalia, develop and mantain the male secondary sex characteristics; protein anabolic -increase in muscle mass; maintain spermatogenesis
Dihydrotestosterone (DHT)
amplify the action of T in some target tissue (converted by 5_-reductase; type 1 - skin, the scalp; type 2 - genital skin, prostate, other genital tissues)
maturation of external genitalia, enlargement of prostate and penis at puberty, facial hair, the acne, recession of hairline