WORKSHOP IN HISTOLOGY, CYTOLOGY AND EMBRYOLOGY - 2016

Chapter 5. SPECIAL HISTOLOGY

Digestive System

Slide 96. Foliate papillae of the tongue.

Staining: hematoxylin and eosin.

Magnification: x80.

The section is made through all layers of the Tongue. One of the surfaces (the lower or ventral surface) is covered with stratified squamous non-keratinized epithelium, which is continuous with the epithelium of the oral mucosa.

The dorsal (upper) surface of the tongue is covered with stratified squamous partially keratinized epithelium and bears papillae: filiform, foliate, and vallate (circumvallate). This slide shows a region with foliate papillae (1). They are formed by outgrowths of the lamina propria of the mucosa (2) and covered with epithelium. The primary papilla (papillary base) (3) may branch into two or three secondary ones (4). In the epithelium on the lateral surfaces of the papillae, light oval spots are visible, which are taste buds (5). Separately, at high magnification, a schematic representation shows gustatory (receptor, sensory) (6), supporting (7), and basal (8) epithelial Cells of the taste bud. The apices of the receptor cells bear microvilli and together form the taste pore.

Deep beneath the mucosa, bundles of striated Muscle fibers are visible running transversely, longitudinally, and vertically. They are separated by layers of loose Connective Tissue and minor Salivary Glands of the tongue (9). The submucosa is absent.

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Slide 96. Foliate papillae of the tongue.



Last update: 07/08/2026

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