Across
- 3. - maintains tension on the chordate tendineae as the ventricle contracts
- 5. - period of contraction when the chambers are pumping blood out of the heart
- 6. - largest vein in the human body,returns deoxygenated blood
- 8. -a large arterial trunk that arises from the base of the left ventr
- 11. - semilunar valve between the left ventricle and the aorta
- 13. - returns deoxygenated blood to the right atrium of the heart from the upper half of the body
- 14. - widening of blood vessels which increases blood flow
- 15. - this narrows blood vessels which decrease blood flow
- 17. - the volume of blood pumped into the heart per beat
- 18. - the valve that closes the orifice between the right atrium and ventricle
- 20. - a wall that separates the right and left atria in the heart
Down
- 1. - the outermost of the heart and innermost layer ofInferior vena cava sac
- 2. - the middle layer of the heart
- 4. - thick wall dividing the two ventricles in the heart
- 7. - the innermost layer of the heart
- 9. -amount of blood pumped from the heart per minute
- 10. - period of relaxation in the heart when chambers are filling with blood
- 12. -tricuspid and mitral situated between the atria and the ventricles (abbreviation)
- 16. - prevent backflow of blood into the ventricles
- 19. - valve that closes the orifice between the left atrium and left ventricle of the heart