Answer:
The circulatory system, also known as the cardiovascular system, is a simple loop which starts, and ends, with your heart. It is a closed system, meaning blood does not enter or leave the system during its journey from your heart to your body and back again.
Explanation:
To reduce the amount of water dumped into the city's sewers system from rainfall by 25 percent
Cellular respiration is the opposite, we breathe in oxygen and release carbon