Catherine E. Woteki

Iron Deficiency Anemia

Cells Need Oxygen The human body is made up of billions of small cells which are grouped together in the various specialized organs such as the lungs, heart, liver, etc. These cells work behind the scenes 24/7 to keep you healthy and active. Day and night, they quietly perform many functions such as growth and repair of tissues, production of heat, motion, circulation, digestion, and so forth. Individually, each small cell is much like a tiny machine which requires many things to do its job including oxygen. The oxygen obviously comes from the air that you breathe. The problem is: How do you deliver oxygen down to each and every cell?