Across
- 4. functions by contracting, applying forces to different parts of the body
- 6. enzymes that help to digest food
- 10. stomach acids that help to breakdown food.
- 11. blood vessels that connect arteries to veins.
- 13. system that removes excess,and unnecessary materials from body fluids.
- 16. system that breaks down food into smaller and smaller components.
- 17. system used for sexual reproduction
- 18. network of nerve cells and fibers
- 19. groups of organs that work together
- 20. group of cells that synthesizes substances
Down
- 1. carries blood through the body
- 2. tubes that form the blood circulation system
- 3. permits movement of body, and helps maintain posture
- 5. system made of bones.
- 7. has white blood cells, organs and tissues
- 8. made of a single muscle cell
- 9. a substance released to stimulate specific cells
- 12. system that circulates blood
- 14. specific organs used for gas exchange in plants and animals
- 15. system that comprises feedback loops hormones.