Anatomy of the Bone A typical bone in your body contains three types of tissue—a hard outer tissue, a sponge-like inner tissue, and smooth tissue at the ends. Anatomy of the Spine Your backbone, also called the vertebral column, is made up of 33 vertebrae separated by spongy disks. Anatomy of the Shoulder The shoulder is a complex joint with several layers, including bones, ligaments, tendons, and muscles. Anatomy of a Joint Joints are the areas where two or more bones meet. Most joints are mobile, allowing the bones to move. Anatomy of the Male and Female Pelvis The pelvis is a basin-shaped structure that supports the spinal column and protects the abdominal organs. Anatomy of the Elbow The elbow is a hinge joint between the humerus bone in the upper arm and the radius and ulnar bones in the lower arm. Anatomy of the Knee The knee is a vulnerable joint that bears a lot of stress from everyday activities such as lifting and from high-impact activities such as jogging. Anatomy of the Foot Your feet are susceptible to many stresses. Foot pain and problems can cause pain, inflammation, or injury. Anatomy of the Hand Each of your hands has three types of bones: phalanges in your fingers; metacarpals in your mid-hand, and carpals in your wrist.