Across
- 4. smaller branches of arteries; eventually branch off to the size of capillaries
- 5. tool used to listen to heart beat or pulse
- 8. when muscle of the heart squeeze to pump blood
- 9. muscle layer of heart
- 12. measurement of the force of blood in the arteries
- 16. tool used to measure blood pressure
- 18. top number in blood pressure, when heart is contracting
- 19. smaller branches of veins; formed when capillaries start to merge with one another
- 21. main vein returning blood into the right atrium
Down
- 1. refers to lungs
- 2. largest blood vessel; main artery leaving heart towards the body
- 3. chambers of the heart that pump blood to the body or lungs
- 6. smallest blood vessel; where oxygen, carbon dioxide, and nutrients are exchanged with the body tissues
- 7. chambers of the heart that receive blood
- 10. blood vessels that deliver blood away from the heart
- 11. areas of the heart that receive or pump blood
- 13. wall of muscle that separates the right ventricle from the left ventricle
- 14. bottom number in blood pressure, when heart is relaxed
- 15. refers to the point at bottom end of heart
- 17. refers to the top of the heart
- 19. blood vessels that return blood to the heart
- 20. prevent blood from flowing backwards