Across
- 6. All parts inside a cell working together like a system
- 8. Biomolecules like sugars and starches used for energy
- 9. Tubes that carry blood around the body
- 13. Chemical substances that speed up reactions in the body
- 14. Tissue forming the outer layer of skin and organs
- 15. Fat-based substances used for energy storage
- 16. Something that surrounds or closes something in
Down
- 1. Means “mainly” or “mostly”
- 2. Happening all the time without stopping
- 3. Tiny structures seen only with a microscope
- 4. Body covering made of protective tissue
- 5. To change something slightly to improve it
- 7. A word meaning “not including”
- 10. Perspiration produced by skin
- 11. Genetic material found in cells
- 12. Tiny particles that make up substances