Across
- 2. – Brief rise in aortic pressure after semilunar valves close.
- 3. – Fetal heart opening that allows blood to flow between atria.
- 7. – The record of the electrical activity of the heart.
- 8. – Represents ventricular depolarization in an ECG.
- 10. – Nerve that slows the heart rate under parasympathetic control.
- 11. – The largest vein in the body returning blood to the heart.
- 12. – Represents atrial depolarization in an ECG.
- 13. – Hormone that increases heart rate and contractility.
- 15. – Common term for the sinoatrial (SA) node that initiates the heartbeat.
- 16. – The thick muscular layer of the heart wall that contracts to pump blood.
- 21. – Fatty deposits in arterial walls that cause narrowing of blood vessels.
- 23. – Blood vessels that supply the heart muscle itself with oxygen.
- 25. – Amount of blood pumped by each ventricle in one minute.
- 26. – Represents ventricular repolarization in an ECG.
- 28. – Blood vessel carrying oxygenated blood from lungs to heart.
- 29. – The pressure the ventricles must overcome to eject blood.
Down
- 1. – Hardening and narrowing of arteries due to plaque buildup.
- 4. – Death of heart muscle tissue due to oxygen deprivation.
- 5. – Fetal connection between the pulmonary trunk and aorta.
- 6. – The phase of the cardiac cycle when the heart contracts.
- 9. – Reflex caused by increased blood in the atria stimulating the SA node.
- 12. – The outermost protective covering of the heart.
- 14. – Blood vessel carrying deoxygenated blood from heart to lungs.
- 17. – The phase of the cardiac cycle when the heart relaxes.
- 18. – The largest artery in the body.
- 19. – Degree of stretch of cardiac muscle cells before they contract.
- 20. – The valve located between the right atrium and right ventricle.
- 22. – Amount of blood pumped by a ventricle with each beat.
- 24. – The valve that prevents backflow from the left ventricle to the left atrium.
- 27. – Chest pain due to lack of oxygen in cardiac tissue.