Your clavicle, or collarbone, is the long, thin bone that connects your chest to your shoulder. You have one on each side of your body. These bones help hold up your shoulders and allow you to move ...

Medically reviewed by Jennifer Steinhoff, MD Key Takeaways The humerus is the only bone in the upper arm. It connects to the shoulder and elbow joint.The humerus works with muscles to raise and rotate ...

When bones break and there is extreme tissue loss--such as after a car accident or a battlefield injury--current treatments don't often lead to effective healing. But certain stem cells from skeletal ...