Across
- 1. smallest blood vessels where materials are exchanged between blood and tissue cells
- 5. the volume of air that moves in and out of the lungs with each respiratory cycle
- 7. the bottom two chambers of the heart
- 8. prevents the backflow of blood
- 9. blood is transported in this vessel to the rest of the body
- 10. this circulation transports oxygenated blood from heart to the rest of the body
Down
- 2. small air-filled sacs in the lungs where gaseous exchange takes place
- 3. this circulation transports deoxygenated blood from the heart to the lungs
- 4. muscles that contract and flatten during inspiration and expiration
- 6. the two top chambers of the heart