Across
- 3. a network of veins that carry blood organs to the liver
- 7. a medical condition in which the body does not get enough blood flow, leading to lack of oxygen and nutrients to organs and tissues
- 9. the pressure blood exerts on the walls of vessels
- 10. hollow core that makes up the arteries
- 11. the main constituent of the heart (second/middle layer)
- 14. a small cluster of specialized heart cells that acts like a gatekeeper, controlling the electrical impulses that pass from the atria to the ventricles
- 16. small branches of arteries that lead into capillaries, they play an important role in regulating blood pressure and blood flow
- 18. between the atria and the septum chambers of the heart
- 22. Irregular heart rate
- 23. the largest artery of the body which receives oxygen-rich blood from the left ventricle
- 25. the microscopic vessels that arterioles divide into in organs and tissues
- 26. dilated veins
- 28. the alternating contraction and relaxation of the heart chambers
- 29. receives blood from the heart muscle and returns it the the right atrium
- 30. the relaxation periods of the heart
Down
- 1. the second main cardiac circuit of the body which extends from the heart to the body's cells and then back the the heart
- 2. responsible for returning blood from the head and neck
- 4. the three layers that makes sense up the walls of blood vessels
- 5. a hormone produced by the hypothalamus that helps regulate water balance the body by increasing water reabsorption in the kidneys
- 6. heart contractions
- 8. inflammation of the heart valves
- 12. a circular network of arteries at the base of the brain that provides collateral blood flow between the anterior and posterior cerebral circulations
- 13. unusual heart sounds - indicate a problem at the valves
- 15. the third layer of the heart, a layer of endothelium lying atop a layer of thin connective tissue
- 17. a condition in which a slow heart rate occurs
- 19. two saclike membranes that enclose the heat
- 20. a condition in which a rapid heart rate occurs
- 21. clusters of neurons found in the major arteries of the neck and chest, such as the aorta and carotid arteries
- 24. the set pace for heart contraction
- 27. the blood vessels that carry blood towards the heart