Identify microscopically:

1. Mucosa

2. Submucosa

3. M. externa

4. Serosa

Draw and annotate:

A line diagram of the appendix vermiformis wherein the typical lymphocyte infiltration is shown.

1. How are the lymphocytes arranged?
2. What is typical of the crypts?

Very low magnification

• Fig. 43-001
• Fig. 43-002