The heart structure

123456789101112131415
Across
  1. 2. deoxyenated blood leaves the right ventricle of the heart
  2. 4. a double walled sac
  3. 6. sudden loss of heart function
  4. 7. lubricates the heart during contractions
  5. 9. the size of a fist
  6. 10. separates the two sides of the heart
  7. 12. produces the electrial pulses that drive heart contractions
  8. 13. the inner wall of the pericardium
  9. 14. this and the tricuspid valve make up the atrioventricular
Down
  1. 1. the heart circulates blood through here
  2. 3. contains the muscle that contracts
  3. 5. conntracts to push blood into ventricle
  4. 8. blockage of any arteries can cause a
  5. 11. deoygenated blood returns via veins to the
  6. 15. oxygenated blood leaves the body via