Across
- 3. Muscle movement that happens automatically.
- 5. Muscles work in __________ pairs.
- 8. Connects muscle to bone.
- 12. The muscles at the back of the thigh.
- 13. Producing heat by rapid muscle contractions.
- 16. The body system muscles work closely with.
- 18. The opposite muscle to the agonist.
- 19. Muscle action where the muscle shortens.
Down
- 1. Movement that bends a joint.
- 2. Muscle found only in the heart.
- 4. The front upper-arm muscle used in a curl.
- 6. The number of bones in the human body.
- 7. Bones act as these to help movement.
- 9. The thigh muscles used during knee extension.
- 10. Straightening a joint movement.
- 11. The muscle doing the work during movement.
- 13. Type of muscle attached to bones and responsible for movement.
- 14. The point where two bones meet.
- 15. Type of muscle found in organs.
- 17. The back upper-arm muscle.
