Breathing is essential to human survival, yet something that we think little about. How do we get air into our lungs, and how do our bodies use the air? This informative book answers these questions. Oxygen is one of the essential nutrients of life. Without it, we would die. This title explores this essential nutrient and describes the complex system of organs that distributes it throughout the body.
Description:
Breathing is essential to human survival, yet something that we think little about. How do we get air into our lungs, and how do our bodies use the air? This informative book answers these questions. Oxygen is one of the essential nutrients of life. Without it, we would die. This title explores this essential nutrient and describes the complex system of organs that distributes it throughout the body.