Cardiovascular System

2. platelets, crucial cell fragments in cardiovascular system that stop bleeding
3. upper right chamber of the heart
5. an abnormal heartbeat where the heart beats too fast, too slow, or irregularly
10. one-way valve in heart that regulates the flow of oxygen-poor blood from right ventricle to the pumonary artery
14. smooth, innermost layer of the heart tissue that lines the heart's chambers and valves
16. muscular wall that separates left and right side of the heart
18. vital blood vessels that transport oxygen-rich blood away from heart
19. iron-rich protein in red blood cells that carries oxygen from lungs to body's tissues and returns CO2 waste back to lungs
20. yellow, liquid part of blood, making up the volume, acts a river carrying red blood cells, white blood cells, platelets, nurients, etc.
22. blood vessels in the circulatory system that carry blood from the body's tissues back to the heart
23. the body's transport network, consists of heart, blood, and blood vessels

1. one of the four chambers of the heart, upper left side
4. one-way gate in the heart, between right atrium and right ventricle, three flaps that open to let blood flow into the ventricle and close to prevent it from leaking back
6. the heart's lower left chamber that receives oxygen-rich blood from left atrium
7. red blood cells
8. lower right chamber of the heart
9. white blood cells
11. double-layered fluid-filled sac that surrounds and protects the heart
12. a network that connect arterioles and venules
13. phase of the cardiac cycle when the heart muscle relaxes
15. thick muscular middle layer of the heart wall
16. phase of the heart muscle contracting to pump blood
17. one-way valve located between left atrium and left ventricle that controls blood flow
21. flap that allows blood from the atrium flow to the ventricle without flowing back