Across
- 3. give blood its red color
- 5. upper chamber that retrieves the blood
- 7. a muscle in the body that pumps blood through the blood vessels to the tissues and cells
- 8. very small blood vessels that pick up waste products
- 10. outer layer of the heart that covers the sac
- 11. recieves blood from the lungs
- 14. also called erythrocytes.
- 15. membrane that lines the inner surface of the heart
- 17. valve between the right atrium and right ventricle
- 18. carry blood away from the heart
- 19. return blood back to the heart
Down
- 1. the thick, muscular part of the heart
- 2. receives blood from the body tissues
- 4. valve between the left atrium and left ventricle, also called mitral
- 6. also called leukocytes, fight off infection
- 9. largest artery that receives blood from the left ventricle
- 12. allow blood to flow in one direction and keeps blood from flowing back into the atria
- 13. pump the blood
- 16. smallest branch of an artery