Across
- 2. blood type O is the universal____
- 3. what is the role of blood in the immune system
- 5. diastole is the ____ period of the heart
- 6. which is thicker, artery or vein
- 7. name the valve between right atrium and right ventricle
- 9. blood pressure is measured with what
- 12. the heart beat starts in the _______ node
- 13. lumen are ____ in veins than arteries
- 15. antibodies are produced in response to ____
- 16. blood clotting requires which mineral
Down
- 1. red blood cells are known as ____
- 2. pulmonary arteries carry ____ blood
- 4. deoxygenated blood returns to the ____ side of the heart
- 8. a bruise is caused by ____ blood cells
- 10. name the outer layer of the heart
- 11. cells that clot the blood are known as ____
- 14. which vessels use valves to move blood