Across
- 1. Area that receives air, food and liquid from the mouth and nose
- 4. Large muscle below the lungs that contracts/relaxes as you breathe
- 5. Microscopic sacs where gas exchange occurs
- 6. Gas that passes out of the blood through the alveoli
- 7. Pair of tubes that connect the trachea to the lungs
- 8. Blood vessel that gases diffuse into through alveoli
- 10. Gas that passes into the blood through the alveoli
Down
- 2. Type of cell that carries oxygen through the blood
- 3. Long tube that air travels down after being inhaled
- 9. Main organ of the respiratory system