Findings

In this low-power image of the dorsal surface of the tongue, the outer layer of stratified squamous epithelium forms the conical-shaped filiform papillae. Note that the squamous epithelium is partially keratinized and rests on a lamina propria that overlies the visceral striated muscle of the tongue.

Comment

Partially keratinized stratified squamous epithelium is resistant to mechanical abrasion that occurs when food is manipulated by the tongue during chewing. The skeletal muscle indicates that the tongue is capable of voluntary motion.

Preparation

Paraffin section, hematoxylin and eosin

View

Low-power light microscopy

Specimen

Tongue

Image Credit

Katsumi M. Miyai, M.D., Ph.D
Department of Pathology
School of Medicine
University of California, San Diego