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Magnesium is an important mineral for building bones, protein, and teeth. It also helps in muscle contraction and nerve function

Marfan syndrome is an inherited disorder that causes problems in the connective tissues of the blood vessels, heart, and eyes, and

Metabolism refers to all of the chemical processes that take place in the body, such as the burning of sugars (glucose) for energy

The median nerve runs the length of the arm, passes through the wrist (within the carpal tunnel), and ends in the hand. It

Meconium is a thick, greenish black substance that forms in the intestines of a fetus. As the fetus swallows and digests the fluid

Ménière's (say "men-YEERS") disease is a disorder of the inner ear that affects hearing and balance. It causes sudden attacks of

A meniscus is a piece of cartilage (rubbery tissue) that acts as a shock absorber between bones and stabilizes the joints by

The menstrual cycle is the body's monthly pattern of preparing for a possible pregnancy. The lining of the uterus (endometrium)

A medial collateral ligament (MCL) injury is a sprain or tear of the MCL, one of four knee ligaments. The MCL is a band of tissue

Some medical tests report results in micrograms per deciliter (mcg/dL). A microgram is one-millionth of a gram. A gram is about 1