Human Body Systems
Across
- 4. The term for the four sections of the heart
- 7. Main organ for the circulatory system
- 8. The main organ of the respiratory system
- 11. Tiny blood vessels that surround air sacs
- 12. Blood vessels that return blood to the heart
- 14. Your heart is the size of this body part
- 15. intestine The organ where most food is digested
- 17. Groups of neurons that pass along information
- 19. Long tube which connects to the mouth and stomach
- 21. Where bones meet
- 23. Main organ for the nervous system
- 24. A kind of skeletal muscle with light and dark stripes
Down
- 1. A kind of muscle found in the walls of the stomach
- 2. A system that supports the body and protects organs
- 3. A kind of muscle that makes up the walls of the heart
- 5. Vessels that carry blood from the heart
- 6. A system that provides nutrients to the body
- 9. A system that sends and receives messages
- 10. Helps soften food and starts the digestion process
- 13. A bag made of smooth muscles that mixes food with digestive juices
- 16. A system that helps move parts of the body
- 18. Nerve cell
- 20. Tube of nerves that runs through the backbone
- 22. Cells of the same type