Cardiovascular System

3. An essential part of the circulatory system, transports in most cases, oxygen-depleted blood back to the heart.
5. Kills unfamiliar protiens
9. Brings blood back to the heart from the body
10. The two upper chambers of the heart, blood is passed to the ventricle through the ________.
12. Returns fluid back to the circulatory system
14. Also known as your lung
16. On the surface of red blood cells, only like similar blood types

1. Known as the pumping chambers, two lowest chambers of the heart.
2. System that permits blood to circle back to the heart, contains arteries, veins, and heart. (Also known as the circulatory system.)
4. Largest blood vessel in the Cardiovascular System, supplies oxygenated blood to the circulatory system.
6. Cannot be seen by the bare human eye, is one cell thick, connects veins and arteries
7. Sends out signals to regulate pulse
8. Waves of changing blood pressure, tells you how quickly your heart is beating
11. Separates the two heart chambers
13. An iron-filled protein that combines blood and oxygen to make blood red.
15. Carries blood AWAY from the heart.