Across
- 5. left atrium recieves blood from
- 6. right ventricle pumps blood into
- 7. two upper heart chambers
- 8. when all heart muscle relax
- 10. has a very small lumen and wall made of a single layer of cells
- 11. chambers on the left and right side are separated by
- 12. when all heart muscle contract
- 13. The main transport system of all mammals
- 17. the blood after respiration
- 19. valve between left atrium and ventricle
- 24. valve between left-hand side of the heart
- 25. heart muscle
Down
- 1. valve between on the right-hand side
- 2. has a thick outer wall,smooth lining,and small lumen
- 3. blood travels through the heart twice on one complete journey
- 4. tools that can measuring blood pressure
- 9. the blood comes from the lungs
- 14. two lower heart chambers
- 15. it is a network of tubes
- 16. has a fairly thin outer wall,smooth lining,and large lumen
- 18. the rate at which the heart beats is controlled by a patch of muscle in the right atrium called
- 20. the muscles of the atria relax
- 21. the muscles of the atria contract
- 22. right atrium recieves blood from
- 23. the heart therefore stops beating called