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The iris is the colored part of the eye. A circular muscle in the iris controls the amount of light entering the eye through the

A bunion (hallux valgus) is an enlargement of bone or tissue around the joint at the base of the big toe (metatarsophalangeal

A bunionette, or tailor's bunion, develops at the base of the little toe. When the long bone that connects to the toe (metatarsal)

Carpal tunnel release surgery is used to reduce the pressure on the median nerve in the wrist. This is done by cutting the

The kidneys and bladder work together to make urine and remove it from your body. The kidneys filter waste products and water from

The thyroid is a butterfly-shaped gland that lies in front of the windpipe (trachea), just below the voice box (larynx). The

Temporomandibular disorder (TMD) causes pain in the muscles and joints that connect the lower jawbone (mandible) to the skull

The temporomandibular (TM) joints join the skull and lower jawbone. These gliding "ball and socket" joints are located just in

Symptoms of cluster headaches often include severe pain around one eye, a runny nose, a watery eye, and a drooping eyelid, all on

Arteries and veins carry blood to and from the penis. These blood vessels play an important role in erections. During an erection