- active growth in human during which person changes from child to adult
- changes known as secondary sex characteristics
- reproductive system of person starts to function properly.
Boys
- testosterone from testes → stimulates the growth at puberty
- testosterone has anabolic (constructive) effect on body
- bones increase in size and mass
- larynx grows and voice deepens
- hair begins to growth on face, chest, under armpits and pubic region
- penis and testicles increase in size
- testosterone effects emotion, sex drive and aggressiveness
Girls
- Oestrogen and progesterone → female sex hormones made by ovaries
- hair appears under armpits and pubic area
- breasts begin to develop
- uterus enlarge with hip broadening (pelvis widening)
- increase in proportion of body fat to lean tissue