Apparently, the process of immulogical specification is highly prone to errors, which, fortunately for us, are corrected before the faulty T-lymphocytes ever get released. The thymus actually has NO afferent lymphatics, only efferent. Both T and B cells are found in the peripheral blood. Lymphocytes exit lymph nodes primarily via efferent lymphatics at the hilus. Lymphocytes populate the white pulp of the spleen by exiting small blood vessels in the marginal zone.
Lymphocytes enter the lingual tonsil via afferent lymphatics.
E. No afferent lymphatics. The epithelium overlying these MALT aggregations is specialized for sampling the luminal contents for antigen, and is the equivalent of the afferent lymphatics of the lymph node. Plasma cells are found in peripheral tissues, and in lymph nodes and nodules. Germinal center in the palatine tonsil. Primary nodule in Peyer's Patch.