1. When your contracts, your lungs can expand.

2. Oxygen passes from alveoli in the lungs to blood in the .

3. The outer ear is made up of skin and , a tough, elastic tissue.

4. To prevent food from getting into the , a flap covers it when you swallow.

5. People who live at higher elevations have greater lung than people who live at lower elevations.

6. The skin has nerves that are to heat, pain, pressure, and touch.

7. A person who is overcome by is less alert than someone who is not tired.

8. The lungs and heart are the main organs in the chest .

9. The lungs filter fat out of the blood as it passes through them.

10. The small child felt safe and secure as he in his mother’s arms.

11. Water droplets formed as steam rising from the boiling water on the lid of he pan.

12. Pleurisy is a disease that makes breathing difficult.

13. Athletes train to build up and strength.

14. The Heimlich maneuver can be used to dislodge food that the passage of air through the trachea.

15. Through , the body gets the oxygen it needs to survive.