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