Relate any two organ systems we have covered so far to each other. Thoroughly di

Relate any two organ systems we have covered so far to each other. Thoroughly discuss the interconnection between the two systems. For example, you may wish to relate the integumentary system to the nervous system by discussing the effects of a burn on the sense of touch.
Also, share one or two (or more) fun and interesting facts about any system or organ we have discussed so far. Either support it or disprove it with scientific evidence. Provide your sources.