Across
- 1. smallest particle of a substance
- 3. substance with defined composition
- 6. living being
- 7. smallest living unit
- 9. functional unit of tissue
- 10. similar structure cells to perform task
- 11. bone
Down
- 2. heart and blood
- 4. smallest part of a substance
- 5. veins
- 6. subcellular structure inside cell
- 8. muscle
- 11. group of interacting elements