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Across 5. Sound heard when ventricles contract during systole 6. Valves open during systole and closed during diastole that have three cusps each 10. The amount of blood in liters ejected by the heart per minute 11. Sound heard during ventricle contraction 12. what the ventricles do when the impulse reaches the Purkinje Fibers 13. Layer of the heart responsible for pumping blood 15. Valves that are closed during systole and open during diastole and the leaflets are attatched by chordae tendinae to papillary muscles 18. The valve between the right atrium and ventricle 19. Makes up the bundle of His 23. amount of pressure the ventricle must overcome to eject the blood volume 24. Receives deoxygenated blood from the body 30. Normal cardiac output 31. moves bood to the pulmondary veins 32. Amount of blood ejected by with each ventricular contraction 33. the hardest working chamber of the heart 34. Cardiac phase when ventricles eject blood into the pulmonary artery from RV and into the arota form LV/Systole 35. Contraction and relaxation of the heartbeat

Down 1. Valve blood is ejected through for systemic circulation 2. Sound produced by turbulent blood flow across the valves 3. term used to refer to the contractile state of the cell 4. The posterior and anterior branches of the left branch of the bundle of His 7. Lines the heart chamber 8. Terminal ends of the right and left bundle branches 9. The valve between the left atrium and ventricle 14. first branches of the systemic circulation 16. Amount of blood remining in a ventricle at the end of diastole or the pressure generated at the end of diastole 17. Visceral pericardium where coronary arteries are embedded 20. Where the impulse is delayed before being sent to the bundle of His 21. Valve blood is ejected through from the RV to the pulmondary artery 22. Pacemaker of the heart 25. Slows heart rate and cunduction through the AV node, decreases strength of contraction 26. receives oxygenated blood from the lungs 27. Ability of cardiac muscle fibers to shorten and produce a muscle contraction 28. Cardiac phase when ventricles fill with blood coming from the atria/Diastole 29. Nerve fibers that increase the heart rate causing more forceful contractions