The elbow joint connects the bone of the upper arm, the humerus, with the two bones of the lower arm, the radius and the ulna. Within the joint structure are three smaller joints, created by the communication of the three separate bones.
The back is one of the most important structural parts of the human body, allowing us to stand upright and balance on two legs. But it is also subject to many traumatic forces that can, either suddenly or over time, cause what most people simply call "back problems".
The hip joint is a ball-and-socket joint formed by the head of the femur, or thigh bone, and the acetabulum of the pelvis. This union supports weight bearing as well as absorbing the forces created by physical activity, standing, and sitting.
The knee is the largest joint in the human body and one of the most complex. It allows you to walk and run, execute a variety of different body positions, and change the direction of your body movement.
Structures of the foot comprise a highly integrated group of 26 bones, with numerous muscles, tendons, and ligaments holding the bony structures together in proper alignment and providing support for balance and movement.