Human Body Systems
Across
- 4. long leg bone
- 7. body system that contracts to pull bones
- 12. body system that brings oxygen into the body and releases carbon dioxide
- 15. groups of cells
- 17. connects nerves to the brain and controls reflexes
- 19. long top arm bone
- 20. tube that connects mouth to the stomach
- 21. body system that moves blood oxygen and nutrients throughout the body
- 22. muscle with 4 chambers that moves blood through the body
Down
- 1. bones that make up the spine in the skeletal system
- 2. body system that protects other organs, makes blood cells, and stores calcium
- 3. groups of tissues
- 5. body system that helps break down food and remove waste from the body
- 6. groups of organs
- 8. part of the digestive system where blood picks up nutrients
- 9. large upper leg muscles
- 10. an organ that controls your actions
- 11. the smallest building block of living things
- 13. body system that controls all other systems and helps you think
- 14. upper arm muscles
- 16. windpipe
- 18. connect to the trachea and exchange gases that we breathe