Across
- 4. Smaller tubes which connect the bronchi and the alveoli
- 7. During inhalation air pressure ________
- 9. Two tubes which split from the trachea
- 10. To use oxygen
- 11. A sheet of internal skeletal muscle that separates the thoracic cavity from the abdominal cavity.
- 12. Small air sacs found in the lungs, sit of gas exchange
Down
- 1. During exhalation air pressure ________
- 2. The external intercostal muscles do this during inhalation.
- 3. This is in the air we breathe and it is very important for our body system.
- 5. The process of releasing energy from food as part of a chemical reaction. Happens inside the cells of all living things.
- 6. The process of taking air and expelling it from the lungs.
- 8. _____muscles-the muscles situated in the ribs that create and move the chest wall.