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Ligaments are strong, tough, ropy connective fibers. They connect bones to each other, connect cartilage to joints, and support

Lightheadedness makes a person feel like they are about to faint or pass out. It is caused by a momentary drop in blood pressure

Light therapy is the use of a high-intensity fluorescent lamp (usually 10,000 lux) to treat a certain type of depression that

Lipid disorders that are inherited are called familial or genetic lipid disorders. These disorders are problems that affect the

The liver is a large organ in the right upper part of the abdomen. It performs a range of complex and important functions that

A liver biopsy involves inserting a needle between the ribs to collect a small sample of liver tissue. Samples of liver tissue can

A liver transplant is a surgical procedure that removes a severely diseased liver and replaces it with a healthy liver from an

A living will, also called a declaration, is a type of advance directive. It documents your wishes about end-of-life medical

Lupus is a long-term autoimmune disease. This means that your immune system attacks your body's healthy tissues. Lupus may cause

Lyme disease is an illness from getting bitten by a tick infected with a certain type of bacteria. It can cause fatigue, headache