Which system provides the functionality for the reproductive hormones?

The endocrine system is responsible for producing and regulating hormones, including those related to reproduction. This system utilizes glands that release hormones directly into the bloodstream, which then travel to various organs and tissues to elicit specific physiological responses. Reproductive hormones, such as estrogen, progesterone, and testosterone, play vital roles in regulating reproductive processes, sexual development, and the menstrual cycle.

In contrast, the nervous system primarily manages rapid communication and response through electrical signals, rather than regulating hormonal responses. The cardiovascular system is critical for transporting hormones and nutrients throughout the body but does not produce them. The digestive system is responsible for breaking down food and absorbing nutrients, which is unrelated to the function of reproductive hormones. Therefore, the endocrine system is the correct answer as it directly provides the functionality for these hormones.