Know the functions of the respiratory system. There are actually two major types of respiration. One type, inhalation and exhalation, brings oxygen into the lungs and forces out carbon dioxide. The second type of respiration occurs inside the body’s cells, where oxygen combines with food to produce energy.
Blood flow: Give a copy of a heart cutaway to each student (the picture should show each of the four chambers and the veins and arteries that enter and leave the heart). Each student should also have a red crayon (oxygenated blood) and a blue crayon (deoxygenated blood). Have your students trace the flow of blood through the heart (from the...