Across
- 3. thin, smooth membrane which lines the inside of the chambers of the heart and forms the surface of the valves
- 4. the constriction of blood vessels
- 7. a very small vein
- 10. the force of blood pushing against the walls of arteries as the heart pumps blood
- 11. Heart chamber that receives blood into the heart and drives it to the ventricles
- 14. Phase of the heartbeat when heart muscle relaxed and allows the chambers to fill with blood
- 16. a small branch of an artery leading into capillaries.
- 17. pressure changes occurring during breathing that enhance venous return
- 19. any of the tubes forming part of the blood circulation system of the body
- 20. networks of fibers that receive conductive signals
Down
- 1. procedure that is used to connect vessels to each other
- 2. any of the fine branching blood vessels that form a network between the arterioles and venules
- 4. each of the two main chambers of the heart, left and right
- 5. the dilatation of blood vessels
- 6. The muscle layer of the heart
- 8. one of the simplest and fastest tests used to evaluate the heart
- 9. membrane, or sac, that surrounds your heart
- 12. muscular blood vessels
- 13. prevent the backward flow of blood
- 15. a serous membrane that forms the innermost layer of the pericardium and the outer surface of the heart
- 18. carries oxygen and nutrients to the cells and picks up carbon dioxide and waste products