Skeletal and Muscular Systems

4. The humerus meets the scapula in this type of joint, of the shoulder.
7. The lower arm bone that allows pivoting. It is near the thumb.
10. Inside the medullary cavity of bones you find this tissue which makes blood cells
11. Only skeletal muscle experiences this when it runs out of energy.
12. Movement of a limb AWAY from the body, like a lateral arm raise.
14. These join bones together, at joints. The ACL is a common one injured in the knee
17. Skeletal muscle is ____ because you can control it's movement.
18. When a bone reduction requires surgery to allow it to heal properly it is called ____ reduction.
19. This type of striated muscle is found in the heart.
20. This type of muscle doesn't fatigue, is involuntary, and found in digestive organs.
21. Where two or more bones meet. Synovial ones have bones that move.
23. This protects the epiphysis of bones, builds the tip of the nose and the pinna of your ears

1. Attaches muscle to bone, achilles is the strongest in the body
2. Bones can be long, short, irregular or ____. The ribs and scapula are examples.
3. Strongest bone in the body, found deep to the quadriceps
5. The contractile unit of a myofibril - made of the A Band and I Band, actin and myosin.
6. Fractures that pierce through the skin are not simple, they are ____.
8. The thin filament that myosin pulls on in muscle contraction
9. Also known as spongy bone, this makes bones lighter while maintaining strength
13. This is the worst type of fracture. The bone breaks into 3 or more pieces
15. The muscle that allows you to extend your lower arm (not flex it)
16. This is the area on the NON-MOVING bone where a muscle is attached via tendon
17. These irregular bones protect the spinal cord and give you support to stand up, you have 24.
22. At this type of joint, movement is only back and forth. The elbow and knee are examples.