The Immune System

It keeps you healthy!

The Three Lines of Defense

First line of defense:

1. Skin

2. Mucous membranes and cilia

3. Stomach acid (HCL) and saliva


Second line of defense

1. White blood cells (phagocytes)

2. Inflammatory response (hello WBC's come here to this wound!)


Third line of defense

1. Lymphocytes

2. Antibodies

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HIV and AIDS

HIV infects your T-cells, which compromises your immune system.

What are the ways in which HIV is transmitted?

The Functions of the Immune System include protecting you from pathogens and returning excess fluid to the heart.

Immune System Check-up: Number your papers 1-3 and answer the following questions.

1. What is the first line of defense against pathogens that can make you sick?

2. What cells of the immune system does the HIV virus infect?

3. What are the 2 functions of the immune system?

HIV Animation
TLC - Waterfalls
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