Respiratory System

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Across
  1. 3. Also known as the windpipe.
  2. 7. Prevents food and fluids from entering the windpipe.
  3. 9. Protects thelungs.
  4. 11. The gas you inhale.
  5. 12. Carry air to and from the alveoli.
Down
  1. 1. A muscular sheet below the lungs.
  2. 2. Makes you able to speak.
  3. 4. The sacks where gaseous exchange takes place.
  4. 5. Movement of air in and out of the lungs.
  5. 6. The process by which gas exchange takes place.
  6. 8. Also called the throat.
  7. 10. The process by which energy is released from food.