Across
- 3. passage way to lungs
- 5. main organ for gas exchange
- 6. main airways that distribute gases in the lungs
- 8. muscle that assist with breathing
Down
- 1. way to breath that isn't your nose
- 2. entry way for oxygen and releases Co2 out
- 4. tiny air sacs that absorb 02 and release it
- 7. blood vessels that pick up 02 to alveoli