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 this interactive, multiple-choice quiz over microorganisms, then review your score and any missed questions at the end.

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

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

Practice questions related to sexually transmitted infections.

Understand how pathogens cause infections in humans.

Explore some different harmful and helpful bacteria.

Brown rats are the ones that can carry diseases to humans and are loathed and feared by many. Details about this animal can be found here.

This lesson plan introduces learners to three parts of a tree and how they function. Extensions can be easily added such as studying the tree rings for evidence of disease, fire, and other detrimental effects on a tree.

Three immunology case studies for students to collaboratively diagnose using the information learned in the accompanying tutorials.

Concerned about where your beef comes from? This article discusses concerns about safe, and healthy beef. International trade and the methods used in raising the staple are included in article.

Amnesia is the loss of memory. Learn what the causes can be, the different types, the symptoms, how it is diagnosed, and what the treatments are.

This site has information for people at risk of a stroke as well as those who have previously suffered from one.

This lesson plan is designed to give young pupils a concrete demonstration as to why they should wash their hands with soap and warm water so they will understand that germs are smaller than the eye can see.

[Free Registration/Login may be required to access all resource tools.] Describes how viruses can be controlled by vaccines and antiviral drugs.

In this interactive map, learn how life expectancy, obesity, hypertension, and physical activity rates have changed dramatically throughout the United States over the last three decades.

BBC provides a comprehensive look at the AIDS epidemic affecting Africa. Content includes an overview of the disease, a case study of South Africa, and more.

BBC provides a comprehensive look at the AIDS epidemic affecting Africa. Content includes an overview of the disease, a case study of South Africa, and more.

This resource is a one-page article provides a brief overview of head lice: causes, risk factors, symptoms, and treatment.

Get health tips and find links to other sites for your guinea pig.

What is a concussion? Find out the causes, symptoms, diagnosis, tests, risk factors, and more. Each of these main topics are discussed in the article.

Unhealthy escapes from reality occur usually to help keep difficult memories at bay. The Mayo Clinic lists the different dissociative disorders and provides symptoms, causes, risk factors, complications, tests and diagnosis, as well as...

This site from the MayoClinic.com provides a great look at the acute inflammation of the brain caused by a viral infection known as encephalitis. Sections in the article include: signs and symptoms, causes, screening, treatment,...

This site addresses some basic questions and concerns about the Severe Acute Respiratory Syndrome (SARS). Content includes a focus on its symptoms and current treatment options.