Olivia Travierso- Unit 4

2. Valve that prevents the oxygenated blood in the left ventricle from returning to the left atrium
4. Valve that prevents deoxygenated blood in the right ventricle from returning to the right atrium
5. The space within blood vessels in which the blood flows
9. Relaxation of the tunica media and the expansion of the lumen
12. Narrows the lumen of blood vessels
14. Small blood vessels that connect capillaries and veins
15. Heart rate that is higher than normal
16. The node that signals the contraction of the atria (AKA SA)
18. The plane that divides the body or organ into inferior and superior halves
21. The muscular wall of the heart
23. Constant high blood pressure
24. The plane that divides the body or organ into anterior and posterior halves

1. Thin-walled blood vessels where gas, nutrients and wastes are exchanged
3. Instrument used to take a blood pressure
6. The node that is located in the wall between the right atrium and right ventricle (AKA AV)
7. Lower, larger chambers that send blood out from the heart
8. System made up of the organs of the heart and blood vessels
10. Valve that allows blood to flow out of the right ventricle to the lungs
11. The plane that divide the body or organ into left and right halves
13. Upper, smaller chambers that receive blood into the heart
17. Smaller branches of arteries
19. The phase when blood is sent out of the heart
20. The longest phase; blood fills the atria
22. Valve that separates the aorta from the left ventricle