Across
- 2. The dome shaped muscle.
- 4. The heart has two _____ on each side.
- 5. Absorbs vitamin D from the sun's rays.
- 6. When one body part functions because another is working.
- 7. The heart supplies itself with blood through this artery.
- 9. The skin keeps the body at the correct ____.
- 11. The first layer of the skin.
- 12. Tiny sacs that air passes through to get to the bloodstream.
- 13. ____ hygiene is when you brush and floss daily.
- 15. Carries all the sense organs.
- 16. These kinds of liquids make the kidneys work harder to extract the water.
- 18. This system removes waste in the form of urine.
Down
- 1. The waste product produce when you exhale.
- 3. A balloon shaped muscle that contracts to alert us of a bathroom break.
- 7. The system that delivers nutrients to the cells.
- 8. Toxins that the kidneys remove from the body.
- 9. Protects and holds the internal organs.
- 10. A pair of spongy air-filled sacs use this system.
- 14. These control the amount of water in the body.
- 17. Blood pumps through this tube.