About this document
Understanding MRS GREN in Biology by knoxscience is a document available to read on EtoBox.
During adolescence, both boys and girls experience significant physical changes as they develop into adults. For girls, puberty typically begins between ages 8-13 as they start menstruating and their breasts and hips develop. For boys, puberty usually starts between ages 9-14 as their testes and penis grow larger and facial/body hair appears. These changes are caused by increased hormone production in the body preparing youth for reproduction.
- Author
- knoxscience
- Language
- EN