respiratory system

Presents an introduction to the human respiratory system, explaining what it is and how it works, looking at the role of blood in the respiratory system, and discussing why breathing problems occur.

Colorful photographs, illustrations, and text describe the respiratory system.

Explains how the parts of the respiration and circulation systems work and illustrates the actions and functions of breathing, talking, the heart, and blood through interesting facts.

Describes the different parts of the body's breathing system, how they work, and how they are affected by pollution, smoking, and asthma.

Presents a detailed look at the respiratory system and its major functions in the human body.

Describes how the human respiratory system works and discusses such related topics as yawning, hiccuping, and coughing.

Discusses the functions and structure of the lungs.

An introduction to the respiratory system and its role in the human body, looking at the throat, windpipe, and lungs, discussing respiratory problems, and offering advice on how to keep lungs healthy.

Describes the respiratory system and how it works.

Answers common questions about the respiratory system.