Across
- 1. Thick wall that divides the two ventricles in the heart
- 5. A period of contraction when the chambers are pumping blood out of the heart
- 6. Valve that closes the orifice between the right atrium and the right ventricle of the heart
- 7. Channels blood from heart to other arteries in body
- 8. Outermost layer of heart, and innermost layer of the pericardial sac
- 9. Widening of the blood vessels, which increase blood flow
- 10. One of the small muscular bundles attached to one end of the chordae tendineae, maintains tensions as ventricles contract
- 13. Output Amount of blood pumped from the heart per minute
- 17. Valve between left ventricle and aorta
- 19. Second largest vein in the body that returns deoxygenated blood to the right atrium of the heart from the upper half of the body
Down
- 1. Largest vein in the body that returns deoxygenated blood to the right atrium from body regions below the diaphragm
- 2. Valves situated at the opening between the heart and the aorta and at the opening between the heart and the pulmonary artery, prevent backflow of blood to ventricles
- 3. Period of relaxation in the heart when the chambers are filling with blood
- 4. Middle layer of the heart, which makes up about 2/3 of heart muscle
- 11. Two valves situated between atria and ventricles
- 12. The volume of blood pumped from the heart per beat
- 14. Narrowing of the blood vessels, which decreases blood flow
- 15. Valve that closes the orifice between the left atrium and left ventricle of the heart
- 16. Wall that separates right and left atria
- 18. Innermost layer of heart, which lines the interior of the heart chambers and covers the valves