The human body requires air to
function. The heart pumps blood into the lungs, which are gas
exchangers. Acting like a bellows, they absorb oxygen and give off
carbon dioxide. The term "respiration" refers to this chemical
process. We think of it as breathing. Our anatomical models
are arranged across two pages. The first deals primarily with the
overall function of the respiration system and the second emphasizes the
lungs. There is overlap, so check them both out.