RT Book, Section A1 Hall, Stanley M. A1 Levitzky, Michael G. A2 Levitzky, Michael A2 McDonough, Kathleen A2 Kaye, Alan David A2 Hall, Stanley SR Print(0) ID 1175534764 T1 Function and Structure of the Respiratory System T2 Clinical Physiology in Anesthetic Practice YR 2021 FD 2021 PB McGraw Hill PP New York, NY SN 9781259641954 LK accessanesthesiology.mhmedical.com/content.aspx?aid=1175534764 RD 2024/04/19 AB Oxygen must be available to most of the cells of the body for them to produce energy and function normally. Carbon dioxide, a by-product of this aerobic metabolism, must be removed from these cells. Hydrogen ions are also produced by several metabolic pathways, and the respiratory system assists in their removal. The respiratory system therefore takes oxygen from the atmosphere, supplies it to the cells, and removes from the body most of the carbon dioxide and hydrogen ions produced by cellular metabolism. Other functions of the respiratory system include acid-base balance, phonation, pulmonary defense and metabolism, and the handling of bioactive materials.