Across
- 1. The heart's longest venous vessel, responsible for draining most of the deoxygenated blood
- 9. One of the two lower heart chambers that receive blood from an atrium and pump it to the rest of the body
- 10. An artery that is short and transports deoxygenated blood from the heart to the lungs
- 14. A large vein that sends back deoxygenated blood from the body to the right atrium
- 15. Divides the ventricles and great arteries
- 17. The cycle that involves blood getting pumped out of the heart and oxygen circulating throughout the body
- 18. Covers the heart wall's inner surface
- 19. Strong and thin strands of connective tissue, attached to the leaflets of each atrioventricular valve to prevent it from opening into the atrium
- 20. Compose the myocardium of the heart wall
- 21. The largest venous structure of the heart that drains majority of the deoxygenated blood exiting the myocardium
Down
- 2. The valves that separate the atria and ventricles, as well as obstruct blood backflow from the ventricles to the atria during systole
- 3. A fibrous sac that encloses the heart
- 4. Covers the heart's outermost surface
- 5. Name
- 6. The valve in the heart that opens and closes to make sure that blood is flowing in the right direction
- 7. A heart chamber that has thin walls and receives blood from the veins
- 8. One of the two branches of left main coronary artery, supplies blood to the front of the heart and to the septum
- 11. The largest artery in the human body
- 12. The valve that allows blood flow from the left ventricle to the aorta and prevents the backflow of blood
- 13. The narrow end of the heart
- 16. The thick middle layer of the heart wall