Cardiology review

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Across
  1. 4. stretching of cardiac muscle fibers before contraction
  2. 5. opposition to blood flow in the systemic circulation
  3. 6. the second heart sound caused by the closure of these valves
  4. 9. the muscle layer of the heart responsible for contraction
  5. 10. the sum of forces opposing ventricular emptying
  6. 11. resistance to blood flow caused mainly by arterioles
  7. 13. the heart chamber that pumps blood into the aorta
  8. 14. the pressure exerted on arterial walls during ventricular contraction
  9. 15. the functional unit where gas and nutrient exchange occurs
  10. 16. the wave of pressure felt when the left ventricle ejects blood
Down
  1. 1. the quantity of blood pumped by the left ventricle per minute
  2. 2. blood vessels that acts as resistance vessels
  3. 3. the outermost layer of the heart
  4. 7. the volume of blood ejected with each ventricular contraction
  5. 8. the lowest arterial pressure during ventricular relaxation
  6. 12. valve that closes to produce the first heart sound