The nursing mother's herbal

"The respiratory system brings us the oxygen we need to live. Without even thinking, we take a breath every few seconds. Just as regularly, we exhale carbon dioxide. The nose, the throat, and the lungs all work together to keep us breathing. The respiratory system also helps protect us from germs and pollutants. As if that were not enough, without the respiratory system we would not be able to smell anything or even talk. We would not sneeze or hiccup. Learn more about the important work performed by this extraordinary body system. Book jacket."--Jacket.