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Ultrastructure of tonsil
Dr. T. Balasubramanian M.S. D.L.O.
The tonsil is made up of a mass of
lymphoid follicles within a fine connective tissue matrix. The
lymphocytes are less closely packed in the centre of each nodule,
otherwise known as the germinal centre, because multiplication of
lymphocytes take place here. Medial surface of the tonsil, facing
the oral cavity is characterised by 15 - 20 openings, irregularly
spaced. These openings lead to deep, narrow and blind ended
recess known as crypts. These crypts may penetrate nearly the
whole of the tonsil. This feature distinguishes it from other
lymphoid organs. The mucous membrane covering the medial surface
of the tonsil is of non - keratinizing stratified type. It dips
down to line the crypts.
Histology of tonsil