Smoking tops the list of risk factors for heart disease. Learn more about how smoking affects your heart, and get some helpful tips to quit smoking.

Detailed information on how the digestive system works, including a full-color, labeled illustration of the digestive system.

A pacemaker is a small device implanted under the skin that sends electrical signals to start or regulate a slow heartbeat.

The mitral valve sits between the left atrium and left ventricle. It's job is to keep blood flowing in the right direction. Mitral valve prolapse is the bulging of the valve causing blood to leak backwards.

Heart murmurs may be caused by a number of factors or diseases, including defective heart valves, fever, and pregnancy. Read on to learn more about this condition.

With advances in technology, pacemakers and ICDs generally last several years and, in most cases, allow a person to lead a normal life.

Detailed information on the most common types of warts, including foot warts, flat warts, genital warts, and filiform warts.

Detailed information on treating aged or sun-damaged skin.

Signs of an underactive thyroid gland (hypothyroidism) may be masked by pregnancy. But the thyroid is important for your baby's brain development. Learn if you should be screened for hypothyroidism.