Across
- 1. – Oxygen-carrying fluid
- 6. – Signal-carrying tissue
- 7. – Body control center
- 8. – Smallest unit of matter
- 9. – Group of similar cells
Down
- 2. – Body part with a function
- 3. – Breathing organ
- 4. – Basic unit of life
- 5. – Blood-pumping organ
- 7. – Hard body tissue