Name______________________________

Period_____

8.3 Guided Reading

First Two Lines of Defense

As you carefully read through the text, answer the following questions as completely as possible!

First Line of Defense

1. Explain how your immune system is like a castle.

Skin and Mucous Membranes

2. Explain why your skin is the body’s most important defense against disease.

3. What is mucous and how does it protect the body from pathogens?

4. What are cilia and how do they protect the body from pathogens?

Chemicals

5. List several types of fluids that contain chemicals your body releases to kill pathogens.

Helpful Bacteria

6. How does bacteria help protect your body from pathogens?

Second Line of Defense - Inflammation

7. List signs of inflammation.

8. What is inflammation and what causes it?

White Blood Cells

9. After white blood cells leave a blood vessel at the site of inflammation, they start ____________________ pathogens.

10. What is the main role of white blood cells?

11. What are phagocytes?

12. What is phagocytosis?

13. What is a fever?

14. How can a fever slow an infection?