Soft Schools
Soft Schools: Respiration
Take this interactive, multiple-choice quiz over human respiration, then review your score and any missed questions at the end.
Texas A&M University
Peer Curricula: Organ Systems
This site gives five instructional units on organ systems: bodily defenses, digestion, detoxification, gas exchange, and coordination and control. Each unit is broken down into sections: "why does it matter," "how we know," "what we...
Other
American Lung Association: How Lungs Work
Click on each key part of the respiratory system to learn about the role it plays in breathing. Also learn how all these parts work together to make the respiratory system work.