As the title implies, this video describes how muscles work. It shows the anatomy of the muscle in relation to bone but also the structure of muscle at the microscopic level.

This animation describes what a bunion is and the one of the possible surgeries used to correct it, namely a metatarsal osteotomy.

This video describes the two types of osteoporosis, the symptoms that it may cause, the tests used to diagnose osteoporosis, and some treatment options. Note the estrogen replacement therapy mentioned in the video may not be appropriate for most patients.

Rheumatoid arthritis is an autoimmune disease that can attack parts of the joint, in most joints in the body. This narrated animation describes how the joint works, how the immune system can erroneously attack joints in RA, and describes some of the treatment options for rheumatoid arthritis.