Question

Answer all the questions please

Answer 1

Explanation:

1. inhalling means to breathe in.
2. Upon inhalation, the diaphragm contracts and flattens and the chest cavity enlarges
3. On the way down the windpipe, tiny hairs called cilia move gently to keep mucus and dirt out of the lungs.
4. Inside the air sacs, oxygen moves across paper-thin walls to tiny blood vessels called capillaries and into your blood
5. exhale
6. the diaphragm relaxes and returns to its domelike shape, and air is forced out of the lungs
7. Carbon dioxide (CO2)
8. The pleura