Circulation, Respiration, Nervous System Crossword

4. Master control center of the Nervous System.
8. Part of an animal where O2 from the environment diffuses into cells and CO2 diffuses into the environment.
11. Found in RBCs, iron containing protein that transports oxygen.
12. Sensory neurons carrying impulses from sense organs to Central Nervous System.
14. Nerve cell specialized for carrying signals from one part of the body to the other.
17. Cluster of air sacs. Where gas exchange occurs.
19. Relay point in between cells.
21. Branched, short, and receive incoming messages from other cells or the environment.
22. Another word for wind pipe.
23. Force of blood against walls of blood vessels.
25. An organ that pumps blood to the entire body, has four chambers, very complex.
26. Large heart chamber that pumps blood to the entire body.

1. treatment for cardiovascular disease, compresses plaque against wall with balloon.
2. Part of the cardiac cycle, the relaxation phase.
3. Allows diffusion in between blood and tissue cells.
5. Largest vein in the body. Has an inferior and superior section that delivers deoxygenated blood to the heart.
6. Chemical that carries info from 1 neutron to another type of cell.
7. 1/2 of the blood, made up of water, salt, protein, and waste.
9. Brings info. into Central Nervous System from outside environment.
10. Branch off the aorta and supply heart with oxygen and blood.
13. Surgery when a blood vessel is removed from one's leg and sewn on the aorta to re-route the blood.
15. Another name for high blood pressure.
16. Scientific name for white blood cells.
18. Layers of connective tissue for protection in the brain.
20. Anything that causes a nerve signal to start.
21. Part of the Respiratory System, a sheet of muscle below the lungs.
24. Sets the tempo of the heart beat.