Across
- 3. system that helps break down food
- 4. system that is made up of nerve cells
- 5. system that is the frame to support the animal's body
- 6. system removes wastes
- 7. system that brings oxygen to the blood and removes wastes, like gas, from the blood
Down
- 1. system moves blood through the body
- 2. system that is made of strong tissues called muscles