Across
- 2. / this gas is removed from the body when we exhale?
- 7. / What gas does the body need to take from the air to survive?
- 8. / What is the name of the process in which air with oxygen enters the body?
Down
- 1. / What are the two branches called that come out of the trached and go into the lungs?
- 3. / the small air sacs where oxygen are exchanged
- 4. / the tube that transport air
- 5. / What is the main organ where gas exchange takes place in the body?
- 6. / What is the name of the muscle that helps the lungs expand during breathing?
- 9. / What part of the respiratory system filter the air when it enters through the nose?
- 10. / What happens to the body if the respiratory system doesn't work properly?