Body Systems

4. A flexible, elastic tissue that covers the ends of bones and acts as a shock absorber.
7. A place where two or more bones meet, which allows for movement.
9. The specialized involuntary muscle found only in the heart that pumps blood.
12. A specialized nerve cell that carries electrical messages, or impulses, throughout the body.
14. Voluntary muscles attached to bones that allow for conscious movement, such as walking or running.

1. A muscle that you can control and move by choice, like the muscles in your arms and legs.
2. The bundle of nerves that extends from the brain down the back and is protected by the vertebrae.
3. The main organ of the nervous system that controls all body functions.
4. Composed of the brain and spinal cord, it processes and transfers information.
5. A tough band of tissue that connects bones to other bones at a joint.
6. A tough cord of tissue that attaches muscle to bone.
8. A bundle of neurons that transmits impulses.
10. The rigid tissue that makes up the skeleton of the human body.
11. Involuntary muscles that control movement in the internal organs, like the stomach and blood vessels.
13. A tissue composed of fibers that contract and relax to create movement.