<img src="https://d5nxst8fruw4z.cloudfront.net/atrk.gif?account=iA1Pi1a8Dy00ym" style="display:none" height="1" width="1" alt="" />
Dismiss
Skip Navigation

Chapter 24: The Immune System and Disease

Difficulty Level: At Grade Created by: CK-12
Turn In

Does this organism look like a space alien? A scary creature from a nightmare? In fact, it’s a 1-cm long worm that lives in the human body and causes serious harm. It enters the body through a hair follicle of the skin when it’s in a much smaller stage of its life cycle.

Like this worm, many other organisms can make us sick if they manage to enter our body. Fortunately for us, our immune system is able to keep out most such invaders. When you read this chapter, you’ll learn how your immune system keeps you safe from harm—including from scary creatures like this!

Bruce Wetzel/Harry Schaefer/National Cancer Institute, colorized by Sam McCabe. visualsonline.cancer.gov/details.cfm?imageid=1762. Public Domain.

Chapter Outline

Chapter Summary

Image Attributions

Show Hide Details
Files can only be attached to the latest version of chapter
Please wait...
Please wait...
Image Detail
Sizes: Medium | Original
 
Here