Breathing is essential to human survival, as it gives us the necessary oxygen we need to live. Yet, the act of respiration is an involuntary process, something many people don't think about on a day-to-day basis. "The Respiratory System" explains how we get air into our lungs, and how our bodies use that air, and the fundamental physical and biological principles underlying respiratory function. In addition, this essential title examines several respiratory diseases and how they affect the body as a whole.