Across
- 2. bone that protects the brain
- 3. a type of involuntary muscle found in the heart.
- 5. a type of involuntary muscle found in the stomach
- 6. longest bone in the human body
- 8. a type of voluntary muscle attached to bones.
- 9. place where ribs attach
Down
- 1. muscles that you control
- 4. muscles that work without your knowledge
- 5. protects the spinal cord
- 7. bones that protect the heart and lungs