WebMD
Web Md: Airborne Allergens
This site from WebMD Health provides an article entitled, "Something in the Air: Airborne Allergens". Includes detailed information on why some people are allergic to certain substances, while others are not. Symptoms of airborne...
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.
Khan Academy
Khan Academy: What Is Pertussis?
An explanation of whooping cough or pertussis is a highly contagious disease caused by a bacteria called Bordetella that infects the respiratory tract.
Khan Academy
Khan Academy: Pertussis Diagnosis and Treatment
Although pertussis can best be diagnosed within the first two weeks of symptoms by a swap sent to a laboratory, other swab tests can be administered later in the illness. Treatment within the first two weeks of initial symptoms is with...
University of Utah
University of Utah: Cardiovascular Pathology Index
This site features a detailed index of photographs for cardiovascular pathology. You can see what a normal human heart looks like and what a sick one looks like too. Come and check it out.