CK-12 Foundation
Ck 12: Biology: Respiratory System Study Guide
Review the structure and function of the human respiratory system.
Other
Introductory Anatomy: Respiratory System
Here, you will find an introduction to the parts and functions of the respiratory system. In addition to learning about how the respiratory system works to keep you healthy, you will also read about problems that impede the breathing...
Sophia Learning
Sophia: The Respiratory System
Provides a basic understanding of the human respiratory system and gaseous exchange.
Other
Respiratory System: How Lungs Work
How do the body's lungs work? Get a brief overview of how our lungs do their job. The explanations are accompanied by diagrams.
McGraw Hill
Online Learning Center: Respiration
This is a very detailed site on breathing/respiration. It covers system organization, mechanics, exchange of gases, and oxygen transport. A very thorough site.
National Institutes of Health
National Heart, Lung and Blood Institute: What Are the Lungs?
Find excellent information about the human lungs, and how they contribute to the gas exchange process for the body. Inside, find detailed illustrations and a short, narrated animation of the respiratory system at work.