Page:Helen Rich Baldwin - Nutrition and Health (1924).pdf/47



4. Talk on subject. A. Explain how air gets into lungs. NOTE: Use any good physiology book for reference. 1. Use diagram of lungs to show nose and throat passages. 2. Inhaling brings fresh air and oxygen to blood. 3. Exhaling returns the impure air and carbon dioxide to air. B. Give reasons why children should breath through their noses. C. Importance of playing out of doors. 1. Exercise increases intake of fresh air. D. Stress open windows at day and night.