8.2Name______________________________

Period_____

8.4 Guided Reading

Immune System Defenses

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

Introduction

1. Your body’s third line of defense involves the ______________________ system.

2. The immune system is also part of the ________________________ system.

3. List the parts of the immune system.

Lymph Organs

4. List the four lymph organs.

Lymph and Lymph Vessels

5. What is lymph?

6. Before lymph reaches the bloodstream, ____________________ are removed at the lymph ___________________.

7. What are lymph nodes?

Lymphocytes

8. What are the two main types of lymphocytes?

9. What does the “B” stand for in “B cells?” What does the “T” stand for in “T cells?”

10. How do B and T cells recognize specific pathogens?

11. What is an antigen?

Immune Responses

12. What are the two different types of immune responses?

13. What is the main function of B cells in an immune response?

14 What is the main function of T cells in an immune response?

15. What is immunity?

16. Explain how vaccinations can build a body’s immunity.