Across
- 2. Bones that protect the heart and lungs
- 3. Tiny blood vessels where oxygen and carbon dioxide are exchanged
- 5. Organ where oxygen enters the blood and carbon dioxide leaves the blood
- 8. Two tubes that carry urine from the kidneys to the bladder
- 11. Muscle that pumps blood throughout the body
- 12. The system responsible for breaking down food
- 13. Organ that filters blood to produce urine
Down
- 1. Long tube through which food passes from the mouth to the stomach
- 4. Tissues that move the skeleton
- 6. The organ where digestion begins
- 7. The windpipe that connects the throat to the lungs
- 9. The process of breathing in and out
- 10. Main artery that carries blood from the heart to the rest of the body