Conversation so far:
which organ is part of more than one organ system
The ovaries produce hormones, which makes them a part of the endocrine system; the ovaries also make eggs, which makes them a part of the reproductive system as well.
are there any other organs that are part of more than one system
The nose is in both the respiratory system and also is a sensory organ in the nervous system.

Question: what is the function
Self-contained rewrite: what is the function of the nose