Across
- 3. chemical substances that help regulate many of your body's functions
- 4. the largest and most complex part of the brain
- 7. these cells protect body against infection
- 9. functional units of the kidneys
- 11. types of cells in the blood that cause blood clots to form
- 15. small vessels that carry blood from arterioles and to small vessels called venules which empty into veins
- 17. two top chambers of the heart
- 18. fluid that delivers oxygen, hormones, and nutrients to the cells
- 20. cells that make up forty percent of blood
- 21. also called the windpipe
- 23. the process of chewing
- 24. blood vessels that return blood to the heart
Down
- 1. a microorganism that causes disease
- 2. muscle that makes the cardiovascular system work
- 4. consists of the brain and spinal cord
- 5. nerve cells
- 6. helps the body deal with stress and respond to emergencies
- 8. a measure of the amount of force that the blood places on the walls of blood vessels as its pumped through the body
- 10. produces hormones that regulate metabolism, body heat, and bone growth
- 12. the inflammation of the appendix
- 13. the second largest part of the brain
- 14. the oxygen carrying protein in blood
- 16. blood vessels that carry oxygenated blood away from the heart
- 19. two lower chambers of the heart
- 22. the main airways that reach into each lung