The Skeletal System

4. A group of organs working together to carry out a major body function.
8. Type of joint that allows movement in one direction, such as the knee or elbow.
9. The framework of bones that supports the body.
11. Smallest living units that make up all organisms.
14. Small bones that make up the spine.
16. A structure made of different tissues working together.
17. A place where two or more bones meet.
18. A group of similar cells working together to perform a function.
20. Tough tissue that connects muscle to bone.

1. Smooth, flexible tissue that covers the ends of bones at joints.
2. One function of the skeleton that helps the body keep its shape.
3. Soft tissue inside bones where blood cells are produced.
5. Tissue that contracts to produce movement.
6. Hard structures that form the framework of the body.
7. Function of the skeleton that works with muscles to allow the body to move.
10. The longest and strongest bone in the human body.
12. Strong tissue that connects bone to bone.
13. Function of the skeleton that shields vital organs such as the brain and heart.
15. Group of bones that protects the heart and lungs.
19. Bone structure that protects the brain.