A typical bone in your body contains 3 types of tissue - a hard outer tissue, a sponge-like      inner tissue, and smooth tissue at the ends.   
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Your backbone, also called the vertebral column, is made up of 33 vertebrae separated      by spongy disks.   
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The shoulder is a complex joint with several layers, including bones, ligaments, tendons,      and muscles.   
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Joints are the areas where 2 or more bones meet. Most joints are mobile, allowing      the bones to move.   
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The pelvis is a basin-shaped structure that supports the spinal column and protects      the abdominal organs.   
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The elbow is a hinge joint between the humerus bone in the upper arm and the radius      and ulnar bones in the lower arm.   
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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.   
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Your feet are susceptible to many stresses. Foot pain and problems can cause pain,      inflammation, or injury.   
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Each of your hands has three types of bones: phalanges in your fingers; metacarpals      in your mid-hand, and carpals in your wrist.   
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