1. Reproductive System The system of organs within an organism that work together for the purpose of reproduction.

2. Ovary The reproductive organ in female animals that produces eggs and sex hormones estrogen and proestrogen.

3. Testes The primary reproductive organ in the male, in which sperm and male sex hormones are produced.

4. Egg The larger female reproductive cell of most organisms that reproduce sexually.

5. Sperm The smaller male reproductive cell of most organisms that reproduce sexually