Human Body Systems
Across
- 2. The HB system that delivers substances throughout the body
- 4. The HB system that takes in oxygen
- 5. The HB system that uses hormones to communicate with the body
- 7. Similar cells working together make up this
- 10. The tiny balloon-like structures in the lung where gas exchange occurs
- 11. The HB system that offers protection and support
- 12. The highest level of organization in living things
- 13. The 'delivery' tissue that gets needed substances to cells
- 16. Blood vessels that carry needed substances to cells
- 17. The HB system that turns food into nutrient molecules
- 18. Atoms that are bonded together make up these
- 19. The tiniest and least complex level of organization in the HB
Down
- 1. The HB system that gets rid of liquid waste
- 3. The process by which oxygen is used to release energy from nutrient molecules in cells
- 6. The HB system that receives information from the environment
- 8. The organ responsible for absorbing nutrient molecules into the blood
- 9. The muscular organ responsible for getting substances everywhere in the body
- 14. The gas needed by the body for cellular respiration
- 15. Different tissues working together are known as these
- 18. The HB system that enables the body to move