PRACTICAL WORKBOOK IN HISTOLOGY, CYTOLOGY AND EMBRYOLOGY - 2016

Chapter 5. SPECIAL HISTOLOGY

Organs of Hematopoiesis and Immune Defense

Slide 86. Tonsil.

Stain: hematoxylin and eosin.

Magnification: x80.

The slide shows a portion of a vertical section of the tonsil featuring one or two crypts visible to the naked eye. The crypts (1) appear as narrow clefts surrounded by purple, rounded clusters of lymphoid tissue known as lymphoid follicles (2). Under low magnification, The surface of the tonsil is covered by stratified squamous non-keratinizing epithelium (3) that extends into the crypts. In some areas, numerous lymphocyte nuclei are visible within the epithelium. Such a region is referred to as epithelium infiltrated by lymphocytes

(4) . Beneath the epithelium lies the lamina propria of the mucous membrane

(5) (loose Connective Tissue) and lymphoid follicles. Inside the lymphoid follicle, a lighter-staining germinal (reactive) center (6) can be distinguished. Deeper, within the submucosa, terminal portions of mucous glands (7) are visible.

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Slide 86. Tonsil.



Last update: 07/08/2026

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