Cells in this membrane, called goblet cells, release mucus to help prevent microorganisms and debris from entering the lungs. The trachea is also lined with tiny hair-like structures called cilia.

The film discusses the anatomical and functional significance of the nose, throat, and ears from a medical perspective. It explains how the nose functions as an air passage that warms and filters ...

The trachea, also called the windpipe ... A layer of protective mucus, called a mucus blanket, covers a large portion of the membrane lining the bronchial tree. The mucus is an important air ...

Cilia are small hairs which beat to push the mucus back up the trachea so it can be swallowed and destroyed in the stomach. Clean air then enters the two bronchi, one bronchus going to each lung.

When you inhale, air enters your body through your windpipe, or trachea ... All along your airways, mucus and hair-like structures called cilia get rid of dust and dirt that come in with the ...