Give an example of an organ that is included in more than one organ system. How does the organ's functions offer a unique contribution to each system?

The correct answer is - ovaries.

Explanation:

Ovaries are organ which plays a distinct role in two different organ system and both roles of the organ are essential. Ovaries not only produces egg in the reproductive system but also produces the hormone which is part of the endocrine system.

The endocrine system is a system of chemical messengers which depends on the feedback loop to release the chemical messenger or hormone directly to the circulatory system, ovaries are part of this system as it produces a hormone.