he circulatory system<span> is a good example of how body </span>systems<span> interact with each other. </span>Your heart<span> pumps blood through a complex network of blood vessels. The </span>circulatory system<span> provides </span>your<span> brain with a constant supply of oxygen-rich blood while </span>your<span> brain regulates </span>your heart rate<span> and blood pressure</span>
