A great description and explanation of the exchange that took place between the Old World and New World as a result of European exploration. Find examples of plants, animals, and diseases that were traded as a result of exploration and...

As annoying as mosquitoes are, they are an essential part of the web of life. However, they also carry and spread diseases that can kill people. See how scientists are researching mosquitoes to help control the spread of these diseases.

This article gives easy-to-understand information about Mononucleosis, including symptoms, how it's passed, diagnosis, treatment, and activity warnings. This is a great article to check out in order to get an overview of information on...

An A to Z list of illnesses and disorders caused by environmental factors, e.g., asthma, allergies, mercury poisoning, cancer and others. Each is listed with a short, one paragraph overview of the condition and causes.

Take an interactive quiz over viruses. After completing the quiz, check your score, and then revisit any incorrect question for further review.

Take a look at some disorders of the human Excretory system.

Explore some different harmful and helpful bacteria.

This resource provides information about Crohn's disease, including, symptoms and treatments.