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Adolescence- Human development when children become adults both physically and mentally

- The brain goes through mental changes

- The body goes through physical changes.

- Puberty is a time of development when the body becomes physically able to reproduce

- begins around the age of 9-13 in girls and 10-15 in boys

- Usually last 3-7 years

The Pituitary gland in the brain begins to release chemicals called hormones.

- The pituitary hormones simulate sex organs to mature

- as they mature, the sex organs start to produce their own hormones.