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ZingPath: Human Body Systems

Immune System

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Human Body Systems

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Lesson Focus

Immune System


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You get to 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.

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Now You Know

After completing this tutorial, you will be able to complete the following:

  • List the body’s defenses to protect itself from infection (nonspecific defenses).
  • Define immune response.
  • Define antigen and antibody.

Everything You'll Have Covered

How do the skin and digestive system help prevent pathogens from entering our bodies?

~ Our skin's acidic secretions, which are produced by our sebaceous and sweat glands, work to keep harmful pathogens out of our bodies. Our digestive system helps to fight against dangerous invaders by killing any pathogens with the acids and enzymes found in the stomach.

How does the body use its temperature to fight off pathogens?

~ In the event that a pathogen reproduces and secrets a poisonous substance into our system, the body increases its number of white blood cells, which, in turn, causes a rise in temperature. By raising its temperature, the body can decrease the pathogen's rate of reproduction and possibly stop it from spreading any further.

What is immune response?

~ Immune response is a special defense mechanism in which the body produces specialized white blood cells. These special white blood cells have antibodies that allow them to destroy specific harmful antigens.

What is the difference between active and passive immunity?

~ The difference between active and passive immunity is the way in which each develops. Active immunity against an illness is developed by getting the illness itself or receiving the antigen via an injection. Passive immunity is developed by transference between a mother and child through either the placenta in the womb or breast milk after birth.

Tutorial Details

Approximate Time 2 Minutes
Pre-requisite Concepts Students should be familiar with the terms: active immunity, antibody, and antigen.
Course Biology
Type of Tutorial Animation
Key Vocabulary active immunity, antibody, antigen