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Class 7
Chapter 6 Class 7 - Adolescence: A Stage of Growth and Change (Curiosi

2.5 Development of Sex Organs

Last updated at April 26, 2026 by

What is Development of Sex Organs?

It is the maturation of reproductive organs during puberty .

Key Facts and Examples
  • Male sex organs like testes and penis develop completely .
IMG013

A medical diagram illustrating the development of
the female reproductive system during adolescence.

Example: Boys notice physical changes in reproductive organs
  • Testes begin to produce sperms during puberty.
Example: Boys become capable of reproduction
  • Ovaries enlarge and eggs mature in girls.
Example: Girls' reproductive system becomes functional
  • Ovaries start releasing mature eggs during puberty.
Example: Monthly ovulation cycle begins in girls
Sex Organ Development Development Boys Girls Primary organs Testes and penis develop Ovaries enlarge Gamete production Sperms produced Eggs mature Reproductive capacity Sperm production begins Ovulation starts Maturity marker Sperm release Menstruation begins
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