Across
- 2. a system that provides structure and support
- 4. a system transfers nutrients from food
- 6. a system that moves air in and out of the lungs
- 7. a small structural unit of the body
- 8. a system that produces offspring
- 10. a system that removes waste from the blood
- 13. a system that transports nutrients, wastes, and blood
Down
- 1. a system that regulates behavior
- 3. a system that protects and supports the body and cells
- 5. a system that protects against injury, infection, or fluid loss
- 9. a system that defends against germs and diseases.
- 11. types of materials made up of cells
- 12. a set of connected parts
- 14. a part of an organism