Cardiovascular system

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Across
  1. 5. A double layered sac that surrounds and protects the heart from overfilling with blood
  2. 6. Largest artery that curves over the heart
  3. 8. Located in the ventricles of the heart and they attach to the cusps of the atrioventricular valves
  4. 11. One of the four valves in the heart and located between the right atrium and ventricle
  5. 13. Thickest and most powerful chamber of the heart and receives oxygenated blood from the left atrium and pumps it out to the body
  6. 14. Thinner walls than arteries and contain valves to prevent backflow of blood
  7. 15. One of the four chambers that receives oxygenated blood from the lungs
Down
  1. 1. One of the four chambers of the heart that receives deoxygenated blood from the body
  2. 2. Also known as the Mitral valve, located between the left atrium and ventricle
  3. 3. One of the four chambers of the heart that receives deoxygenated blood from the right atrium
  4. 4. The muscular middle layer of the heart wall
  5. 7. Smallest blood vessels in the body, connection arterioles and venules, thin walls
  6. 9. Small-diameter blood vessels that branch out from arteries and lead to capillaries
  7. 10. Outermost layer of the heart wall, a thin serous membrane
  8. 12. Large vein that carries deoxygenated blood to the heart from the body