Across
- 1. which gas is filled in balloons
- 4. framework within our body
- 5. Which Planet is known as the Red Planet
- 7. How many sense organs in human body
- 9. largest ocean in the world
- 10. longest bone in human body
Down
- 2. natural skin pigment
- 3. Control centre of the human body
- 5. which planet is closest to the Sun
- 6. smallest bone in the human body
- 8. smallest microorganism