The Circulatory System: The Heart
Across
- 3. hold things together
- 5. atria are separated by the _______
- 7. _______ connect each atrium to corresponding ventricle
- 8. the medial cavity of the thorax
- 11. type of semilunar valve
- 14. the outermost layer of the pericardium
- 17. _______ keep the blood going in the correct direction
- 19. inner layer of serous pericardium, outermost layer of heart wall
- 21. ventricles are separated by _______
- 23. pumping chambers
- 25. delivers blood to the right atrium draining from the myocardium
- 26. outer layer of the serous pericardium
- 27. connect ventricles and arteries that stem from them and prevent blood that is leaving from flowing back into ventricle
- 28. delivers blood to the right atrium from upper parts of body
- 30. passage of the oxygenated blood from the left ventricle through the body, providing oxygen and nutrients, and back to the right atrium
- 32. dense connective tissue that protects the heart
- 33. type of semilunar valve
Down
- 1. junctions between the cells are called _______
- 2. the layers surrounding the heart chanbers
- 4. makes up most of heart, mainly consisting of cardiac muscle
- 6. passage of the blood from the right ventricle through the lungs and back to the left atrium
- 9. dense network of connective tissue fiber that provides structural support and insulates electrical activity
- 10. layer of endothelium that lines the heart chambers
- 12. second layer of the pericardium
- 13. allow for ions to pass through
- 15. heart's own type of muscle, short and fat, one or two nuclei each, branched and interlocked with each other
- 16. muscular organ that pumps blood through the circulatory system
- 18. left AV valve, two flaps
- 20. delivers blood to the right atrium from lower parts of body
- 22. receiving chambers
- 24. cardiac and skeletal muscle are _______
- 29. largest artery in the body
- 31. right AV valve, three flaps