The different parts of the immune system and its cell types are explained. Also described are the three kinds of immunity humans have - adaptive, innate and passive - as well as the major types of disorders of the immune system.

The human body requires a multilayered immune system to keep it running smoothly. The two main classes of the immune system are the innate immune system and the adaptive immune system, or "acquired immunity". This article discusses the...

Students learn about the immune system and complete a crossword puzzle to practice vocabulary. The instructional activity and a set of PowerPoint slides can be downloaded. Includes an instructional video on immune system vocabulary terms...

In this video segment from The Secret of Life, watch as a virus attacks a cell, and learn how the immune system reacts to this onslaught. Includes background reading material and discussion questions. [1:40]

[Free Registration/Login may be required to access all resource tools.] If pathogens get through the body's first two lines of defense, a third line of defense takes over. This third line of defense involves the immune system. The immune...

The human immune system has various ways of responding to an infection caused by bacteria or viruses. Our bodies produce proteins (antibodies) that are highly specific for the infectious agent as a part of our "humoral" immune response....

[Free Registration/Login may be required to access all resource tools.] Discusses immunity and the differences between active and passive immunity.

This activity explains what a fever is and how the immune system uses it to try and protect the body against germs. The students then explore temperature further by creating a model of a thermometer and completing a temperature...

This article will help students learn how to describe the lymphatic system and its functions in the immune response, explain the role of antigens, describe a humoral immune response, identify roles of different types of T cells, define...

This fact sheet provides a quick overview of the major health problems linked to overexposure to UV radiation: skin cancer (melanoma and nonmelanoma), premature aging of the skin and other skin problems, cataracts and other eye damage,...

A comprehensive site that includes the mention of the different roles the different lymphocytes make.

There are battles that are fought each day on the planet. The invading forces are those of viruses and bacteria. Left alone they would take over and destroy every cell! It is up to some key defense systems to battle and destroy these...

Learn why the Sun keeps us healthy, and also, learn how the Sun can harm our skin, eyes, and immune system. Read about the dangers associated with the Sun's ultraviolet rays, and read tips to help you stay safe when outside in the summer...

This site from MedicineNet.com gives an in-depth description of mononucleosis, its causes, symptoms, diagnosis and treatment, as well as complications that can come up. Links are provided for easy access to the topics as well to...

This virtual laboratory demonstrates how an enzyme-linked immunosorbent assay (ELISA) is carried out and some of the key experimental problems that may be encountered. Students will learn about the assay procedure and the equipment and...

Insightful article that categorizes and describes the various types of allergies. Also gives information on treatment of symptoms.

An in-depth look at cancer and the human body. Learn about cancer on a cellular level, types of cancer, how genetics and lifestyle risk factors play a part in cancer growth, and much more.

Most people, especially young adults, think they look better with a tan. But excessive sun exposure can cause serious damage to your skin and can lead to skin cancer. Find out how to be smart in the sun.

This video describes the role of the brain in regulating body temperature and how sometimes fever is employed to fight off infection.

Feeling stuffy? Running a fever? Well, read through this article and learn about the different types of germs and what you can do to prevent them. Don't miss the link that includes articles to similar sites.

Antibodies, also called immunoglobulins, are proteins manufactured by the body that help fight against foreign substances called antigens. When antigens enters the body, it stimulates the immune system to produce antibodies. (The immune...

Learn all about the flu and how to prevent it by washing your hands, protecting yourself, stopping the spread, and boosting your immune system.

A very strong overview of cell mediated immunity and the roles of the different cells within the system.