You will discover the major systems that allow the human body to function properly, and learn the important roles that each of these systems play. Some diseases and limitations of the human body are also discussed.
After completing this tutorial, you will be able to complete the following:
How do autoimmune diseases affect the body?
~ Autoimmune diseases cause the immune system to become unable to distinguish between foreign invaders and the body's own cells. If the immune system attacks the body's own cells, cellular damage and damage to tissues or organs may occur.
What are some examples of autoimmune diseases?
~ Some examples of autoimmune diseases include rheumatoid arthritis, multiple sclerosis, lupus, and Graves' disease.
How does the body respond when exposed to allergy-causing antigens, and what symptoms result?
~ When a person comes in contact with an allergy-causing antigen, the antigens stick to antibodies on the surface of some of the body's white blood cells called mast cells. This causes the mast cells to release histamine into the bloodstream. Histamine interacts with tissues in the body to produce redness, swelling, and noticeably increased mucus production.
How does HIV/AIDS compromise a person's immune system?
~ When a person becomes infected with the HIV virus, the virus quickly begins to reproduce and, in the process, destroys the immune system's CD4 T-cells. This eventually causes the immune system to collapse, leaving the body unprotected against other forms of disease.
|Approximate Time||2 Minutes|
|Pre-requisite Concepts||Students should be familiar with the terms: biology, body system, and AIDS.|
|Type of Tutorial||Animation|
|Key Vocabulary||biology, body system, AIDS|