Lung Association presents this concise description of normal and abnormal lung anatomy. Includes mpeg videos of the inner lung.

Read an encyclopedia article to learn about this part of the abdomen that helps manage breathing and helps digestion.

Profile of this component of the respiratory system presents details on its functions, and related disorders. Find related links.

Peruse an overview of this organ's functions, related disorders, and a definition of respiration. Includes links to related resources.

Read a brief encyclopedia article that describes the various locations of these spaces where mucous is produced.

Outlines the structure and function of this system, both in humans and in other animals. Includes multimedia study aids.

Encyclopedia article describes the anatomy and the function of the windpipe in the human throat.