Difference between primary sex organs and secondary sex organs
1. They produces gamates. They do not produce gamates, they are concerned with the condition of gamates.
2. They also secrete sex hormones. They do not secrete sex hormones.
3. testes in male and ovaries in female are examples of primary sex organs. Epididymes, vasa deferentia, penis, etc. are secondary sex organs in male and oviducts, uterus, etc are examples of secondary sex organs in female.