1. Which of the following is an example of naturally acquired active immunity?

2. A role of immunoglobulin G (IgG) is to:

3. Phagocytosis takes place in:

4. One purpose of lymph nodes is to:

5. The majority of lymph fluid in the body returns to the venous circulation via the

6. Cytokines are chemical messengers which:

7. The thymus is where T-cell lymphocytes:

8. Which of the following are characteristics of free macrophages and microphages?

9. B-cell lymphocytes mature in the:

10. Lymphoid organs include the