1. Puberty (10-15 yr Old Onset)
Secondary Sex Characteristics and other changes

2. Female Changes (Secondary Sex Characteristics)
Pituitary glands “tell” ovaries to secrete estrogen (female hormone).
Causes the following changes:
Fat deposits in breasts
Elaborate duct system in breasts
Pelvis broadens
Skin softer and smoother
Fat deposits in hips, buttocks, thighs
Pubic hair

3. Female cont. Hair under arms develops Vaginal secretions begin
Ovulation occurs (egg released monthly)
Menstruation begins
Estrogen causes bones to stop growing in length
Acne

4. (Secondary Sex Characteristics)
Male Changes
(Secondary Sex Characteristics)
Pituitary glands “tell” testicles to secrete testosterone (male hormone).
Causes the following changes:
Longer heavier bones
Larger muscles
Thicker tougher skin
Deeper voice
More body hair
Pubic hair

5. Males cont. Increased metabolism Sperm production begins
Genitals develop
Some experience baldness later in life
Sudden uncontrolled erection of penis
Nocturnal emission (wet dreams)
Acne
Emotional concerns over body changes or lack of changes

6. Male/Female Reproductive System Links
Male reproductive system (2 Tabs)
Hover over organs to get function
Female reproductive system and menstrual cycle (3 Tabs)
Click on Menstrual Cycle tab to watch animation