Across
- 2. This protects your skin from sun exposure.
- 3. This system exchanges oxygen and carbon dioxide.
- 8. This type of muscle is only found in the heart.
- 10. This system breaks down food to provide nutrients and energy.
- 12. You can control this type of muscle.
- 13. The part of the blood that carries nutrients.
- 14. This system transports nutrients throughout the body.
- 16. This organ moves food from the mouth to the stomach.
- 17. These are the air sacs of the lungs.
- 18. This system removes waste from the body.
- 19. This system fights pathogens.
- 22. This organ has thousands of alveoli.
- 23. This organ filters blood from arteries using nephrons.
- 24. This system protects your soft organs.
Down
- 1. This muscle, when pulled down, fills the lungs with air.
- 4. 90% of nutrients are absorbed in this organ.
- 5. This type of marrow makes red and white blood cells.
- 6. The tiniest and most numerous blood vessels.
- 7. This soft, jelly-like substance is the center of bones.
- 9. The organ that pumps blood.
- 11. This system works with your skeletal system to help your body move.
- 15. This is the outer layer of the skin.
- 20. This organ stores urine.
- 21. This system protects the body from injury and bacteria.