Body information for teens

Explains how the body is shaped by heredity, how its various systems and organs work, and how it changes over time, beginning with the stages of fetal development and continuing through childhood, puberty, and the aging process. Describes the steps important to maintaining good health, including eating right, exercising, practicing good hygiene, and visiting health care providers for regular checkups. Also includes information about lifestyle choices that can affect a person's health for a lifetime, such as substance use, sexual activity, and body adornment.