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In a normal heart, a thin layer called the pericardium surrounds and protects the heart. There is a small amount of fluid between

Cartilage is a type of hard, thick, slippery tissue that coats the ends of bones where they meet with other bones to form a joint

Ringworm of the skin usually causes a rash made up of circular patches with raised, red edges. The edges may be peeling or scaly

Nerves run throughout the foot. They control movement and feeling in different parts of the foot.

A hip fracture is a break in the upper part of the thighbone (femur) where the thighbone joins the pelvis to form the hip joint

Lymph nodes are small, bean-shaped structures in the body that are sometimes incorrectly called "glands." They are part of the

Colon polyps are growths in the colon or rectum. The cause of most colon polyps is not known. Most polyps do not cause symptoms

Gallstones develop when cholesterol and other substances in the bile form crystals that become hard stones in the gallbladder. The

Tension headaches can cause pain: In your upper back and neck. At the base of your head. Around your ears. In your jaw. Above your

In endocarditis, bacteria that have entered the bloodstream settle on the inside of the heart, usually on the heart valves.