Across
- 4. What type of pressure decreases during inspiration? [9]
- 5. What are the tiny air sacs where gas exchange occurs? [7]
- 9. What is the name of the flap that prevents food entering the trachea? [10]
- 10. What is the term for breathing in? [11]
- 11. What feature of alveoli increases gas exchange efficiency (large area)? [7]
- 12. What gas is taken into the body during respiration? [6]
- 13. What muscle contracts to cause inspiration? [9]
- 14. What type of movement occurs in gas exchange (from high to low concentration)? [9]
Down
- 1. What smaller branches extend from bronchi? [10]
- 2. What surrounds alveoli to aid gas exchange? [10]
- 3. What gas is removed from the body during respiration? [13]
- 6. What is the normal volume of air inhaled in one breath called? [5]
- 7. What structure connects the larynx to the bronchi? [7]
- 8. What structures branch from the trachea into the lungs? [7]
- 9. What is the term for breathing out? [10]