Answer the following question given this paragraph: 

Male Reproductive Structures. Organs of the male reproductive system include the penis, testes, and epididymis. Several ducts and glands are also part of the system. Do you know the reproductive functions of any of these structures?.


Q: Organs of what male biological system include the penis, testes, and epididymis?

 Choices:

- immune system

- romantic system

- circulatory system

- reproductive system

A:
reproductive system
