Across
- 3. forms framework of the body
- 4. system brings in oxygen and removes carbon dioxide
- 8. bones which protect our spinal cord
- 9. bones that cover lungs
Down
- 1. smallest bone in human body
- 2. muscular organ that provides blood circulation
- 5. veins set of veins that deliver oxygenated blood from the lungs to the heart
- 6. full form of Hb
- 7. name of food pipe