Air first enter your _______ and then into the left part of your _______. it is then driven by your heart into the ______, all the way throughout the body. The heart pumps ______ which transport essential nutrients, _______ and other chemicals to every cell of the body. Once it reaches the cell, oxygen processes the nutrients to release energy. ______ is given off during this process. the blood delivers carbon dioxide into the ______ portion of the heart, from which it is pumped to the _____. Carbon dioxide leaves your body through the lungs when you _______.​