Why isn't your immune system fighting against those allergies? In this video you will learn that the immune system detects allergens as harmless. Check out this video to learn more!

This video takes an in depth look at four types of allergies: rhinitis, asthma, atopic dermatitis, and food allergies. Viewers will learn the differences between these allergies and what causes them. There are fantastic images in this...

Now that we've talked about your blood vessels, we're going to zoom in a little closer and talk about your blood itself. We'll start by outlining the basic components of blood -- including erythrocytes, leukocytes, platelets, and plasma...

Paul Andersen explains how your body protects itself from invading viruses and bacteria. He starts by describing the nonspecific immune responses of skin and inflammation. He then explains how we use antibodies to disrupt the function of...

A baby was switched at the hospital! How will the Amoeba Sisters figure out who are the correct set of parents? Follow the process and learn about inherited characteristics such as blood type in this video. [7:04]