Trachea (Lungs) - GCSE Biology Definition

The trachea, also known as the windpipe, is a tube that connects the throat (pharynx) to the lungs. It plays an important role in the respiratory system by providing a clear path for air to travel in and out of the lungs. The trachea is supported by cartilage rings, which help keep it open and maintain its shape. The cells lining the trachea include ciliated cells with tiny hairs called cilia and goblet cells that produce mucus. The mucus traps dust and other particles, which are then wafted to the back of the throat by the cilia to be swallowed, preventing them from reaching the lungs. This system allows efficient and safe breathing, supporting the exchange of oxygen and carbon dioxide in the lungs, which is essential for the body to function properly.