Cardiovascular system

2. / a smooth layer of cells that lines the inside of the heart.
5. / this side receives oxygenated blood
6. / this valve is located between the right ventricle and the pulmonary artery
9. / connects arterioles with venules
10. / fluid that makes blood.
12. / the smallest veins.
13. / this side receives deoxygenated blood.
14. / a double-layered membrane that covers the outside of the heart
15. / the thickest, muscular layer.
17. / smallest arteries
18. / a complex protein composed of the protein molecule called globin and the iron compound called heme.
19. / this valve is located between the right atrium and the right ventricle.

1. / blood flows into this chamber after entering the superior and inferior vena cava
3. / located between the left ventricle and the aorta
4. / blood vessels that have valves in them.
6. / a small battery-powered device with electrodes.
7. / this is another word for "mitral"
8. / seperates the heart into a right side and left side.
11. / the two lower chambers
16. / the largest artery in the body.