Question

Which areas in a secondary lymphoid organ allows intimate contact between blood and the lymphocytes?

Answer 1

Answer: White pulp of the spleen

Explanation:

The white pulp of the spleen is that region found in the spleen which appears white in color.

It appears whiter than the surrounding red pulp on the gross section which consitutes to about 25% of the whole splenic tissue.

This area has antigen presenting cells and dendritic cells and macrophages. Some of the cells there are known as metallophillic mcrophages which helps in keeping the body free from diseases.