Across
- 4. have no internal skeleton
- 6. produces red and white blood cells and stem cells
- 7. dense tissue found in the ear and nose also between joints
- 9. condition caused by a loss of bone tissue
- 11. Muscle that is attached to the bone by tendons and allows voluntary movement
- 13. system made up of bones and the muscles that move them
Down
- 1. attached to the skeleton to help it move
- 2. Hard and dense consisting of a matrix of materials
- 3. specialized cells make up the heart which contract and relax in a rhythm
- 5. a hard outer shell
- 8. connects bones to muscle
- 10. line internal organs such as the digestive tract and blood vessels
- 11. made up of various connective tissue
- 12. tough elastic tissue that connects bones together at the joint