The reproductive system is a group of organs and structures in the body that work together to produce offspring. In humans, it includes the ovaries, testes, uterus, and penis, among others. The primary function of this system is to facilitate reproduction through the production of gametes, which are the sperm and eggs. In females, the reproductive system is responsible for nurturing a developing fetus during pregnancy. In males, it produces and delivers sperm. Hormones like estrogen and testosterone play crucial roles in regulating these processes, ensuring the proper functioning of the reproductive system throughout life.