Circulatory System Puzzle

1. allows blood to flow from the left ventricle to the aorta and prevents blood from flowing backward
10. returns deoxygenated blood from the myocardium to the right atrium
11. receiving rooms for the blood
13. Receives blood returning to the heart from the superior and inferior vena cava
16. a hollow part or cavity in an organ.
17. the membrane that surrounds the heart
18. the left atrium receives oxygenated blood from the pulmonary veins.
19. the main artery of the body
20. allows blood to return from the capillary beds to drain into the larger blood vessels, the veins.

2. a rhythmically recurrent contraction
3. a serous membrane that forms the innermost layer of the pericardium and the outer surface of the heart.
4. the triangular wall of cardiac tissue that separates the left and right ventricles
5. fine branching blood vessels that form a network between the arterioles and venules.
6. a rhythmically recurrent expansion
7. the muscular tissue of the heart
8. the thin, smooth membrane which lines the inside of the chambers of the heart and forms the surface of the valves.
9. A blood vessel that carries blood to the heart from tissues and organs in the body
12. protects the heart
14. the body cavity that holds the heart
15. These strong, muscular blood vessels carry oxygen-rich blood from your heart to your body