Across
- 2. Contraction phase of the heartbeat
- 3. supply blood to the head and neck
- 6. innermost layer of epithelial cells
- 9. middle,muscular layer of the heart wall
- 11. Blood pressure is measured using
- 12. Relaxation phase of the heartbeat
Down
- 1. heart pump consisting of four chambers
- 4. Smaller branches of arteries
- 5. Partition or wall dividing a cavity
- 7. Smallest type of blood vessel
- 8. prevent the backflow of blood
- 10. One of two lower chambers of the heart