Examine the paracortical zone on the following slides (sample 1, sample 2, sample 3) and identify the specialized "high endothelial venules" there.

How would you classify “high” endothelial cells with regard to epithelial type?

What is the functional significance of these venules?

On these same slides identify the medullary cords and medullary sinuses.

Why are these structures called medullary cords?

What lymphocytes constitute most of the cells in medullary cords?

Now for mucosa-associated lymphoid tissue (MALT)