1. GROWTH & CHANGE

2. Adolescence - The period from childhood to adulthood. The period from childhood to adulthood.

3. Puberty - When a person begins to develop certain traits of an adult of his or her own gender. When a person begins to develop certain traits of an adult of his or her own gender.  Puberty marks the beginning of adolescence.

4.  What is responsible for the changes that affect teens during puberty?? -- Hormones

5. Hormones- -Chemical substances that are produced in glands. -They play a role in sexual growth, development, and reproduction.

6. Testosterone – male hormone male hormone Estrogen & Progesterone - female hormones

7. Primary Sex Characteristics - - -directly related to the production of reproductive cells called, gametes.  Male gametes – sperm  Female gametes - eggs (ova)

8. Secondary Sex Characteristics- Additional changes during puberty that occur over several months or years.

9. Secondary Sex Characteristics: Males :  Facial hair appears  Body hair appears  Voice deepens  Shoulders broaden  Muscles develop  Hairline begins to recede  Perspiration increases

10. Secondary Sex Characteristics: Females :  Breasts develop  Body hair appears  Waistline narrows  Hips widen  Body fat increases  Menstruation starts  Perspiration increases Puberty