Across
- 5. another term for intrinsic control of blood flow
- 6. vessels that carry oxygenated blood away from the heart
- 9. percentage of blood that is formed elements
- 10. protein that transports oxygen
- 11. blood vessels getting wider
- 13. amount of blood pumped by LV in one contraction
- 15. sets natural sinus rythm and initiates signal for contraction
- 16. increase in heart rate without an increase in intensity
- 18. breathing process that assists in venous return
- 19. ventricles are relaxed and filling
- 20. amount of blood pumped by the LV in one minute
- 21. delays signal from SA node to allow ventricles to fill with blood
Down
- 1. amount of blood in LV after diastole
- 2. everything that occurs during 1 heartbeat
- 3. Parasympathetic nervous system and sympathetic nervous system acting on SA node to affect heart rate
- 4. muscles in calves assisting in venous return
- 7. vessels that bring deoxygenated blood back to the heart
- 8. sensory neuron that detects local changes at the active muscle
- 12. branches of the AV bundle that transmit impulses in ventricles causing them to contract
- 14. narrowest vessel where gas exchange occurs
- 17. heart controlling its own signal