Explain how the respiratory system plays a role in the function of the circulatory system.

respiratory and circulatory systems bring oxygen and nutrients to the cells. The respiratory and circulatory systems work together to maintain  The respiratory system moves gases into and out of the blood. ( brainlist)

Explanation:

Most of the plant's roots get submerged under water. In this condition, they may not get oxygen for respiration; so the roots are forced to respire anaerobically. This results into accumulation of lactic acid which kills the plant.

That is why there may be little plant life near a river or stream; especially in water-logged areas.