a flood of biological events leading to an adult-sized body and sexual maturity. The physical transition to adulthood. A. Hormonal Changes Hormonal changes gradually begin by age 8-9 Increase of GH and thyroxin Sexual maturation controlled by sex hormones (estrogen, androgen) Testes release large amounts of the androgen, testosterone muscle growth, body and facial hair Ovaries release estrogen breast, uterus, and vagina maturation, broadening of the hips, fat accumulate, and regulation of…
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