Across
- 3. this system provides pathways to move oxygen through the body while also getting ride of waste
- 4. we release this gas back into the environment
- 9. type of muscle that allows us to move our bodies
- 11. the part of the skeletal system that protects our organs
- 14. lower chambers of the heart
- 16. blood vessels that connects the arteries and veins
- 18. type of movement that we cannot control
- 19. largest level of organization within the human body
- 21. this system is a connection site for the muscular system and provides our bodies support
- 22. flexible connective tissue between joints
Down
- 1. smallest level of organization within the human body
- 2. type of muscle that makes up our heart
- 5. this type of blood cell works to fight infections within our bodies
- 6. this system contacts and relaxes to help our bodies move
- 7. we breathe in this gas from the environment
- 8. this blood vessel carries oxygen-rich blood
- 9. type of muscle that can be found working without being told to in our digestive system
- 10. a place where two or more bones meet
- 12. upper chambers of the heart
- 13. this system removes carbon dioxide from our bodies and allows oxygen from the environment in
- 14. this blood vessel carries oxygen-poor blood
- 15. type of movement that we can control
- 17. this part of the respiratory system is where oxygen and carbon dioxide are exchanged within the blood cells
- 20. carry oxygen and waste through our body
