A.Write two body system involved in doing the following 1.Blood is delivered to the kidneys where is cleaned of wastes. a._______ b. ______ 2.The brain tells the heart to speed up when you exercise. a._______ b.______ 3.The blood delivers oxygen to muscles,which they need to contract or relax when you want to move a.______ b._______ 4.The brain controls the muscles that control breathing in and out. a.________ b.________ 5.The lungs provide the oxygen that the cells in the stomach need to digest a.______ b________
