1.1.5 How Your Immune System Fights Pathogens
Not all germs cause disease. When microbes cause disease, they are called pathogens. The immune system actually acts as the second line of defense for the body against pathogens. The first line of defense is innate immunity—the barriers between the body and the outside world such as the skin and mucous membranes. To learn about how our body protects us against germs, we need to learn about the immune system.
The following videos are a three-part “crash course” on the immune system. After you watch them, try and complete the exercise below.
1. Immune System, Part 1: Crash Course A&P #45 (9:12)
Click here to download a video transcript in .docx format: Video Transcript
2. Immune System, Part 2: Crash Course A&P #46 (9:44)
Click here to download a video transcript in .docx format: Video Transcript
3. Immune System, Part 3: Crash Course A&P #47 (9:37)
Click here to download a video transcript in .docx format: Video Transcript
Practice Makes Perfect
Using the information you learned from the videos, answer these questions.
