Abstract
Keratinization, Keratohyalin granule, Epithelium, Pharynx, Mouse Summary: In the mouse laryngopharynx, the stratified squamous epithelium was studied by transmission electron microscope in order to determine its morphological characteristics. The superficial cells were filled with opaque filaments embedded in a less opaque interfilamentous substance. Further, they had thickened plasma membrane and contained a fairly large number of keratohyalin granules showing ultimate stages transforming into interfilamentous substance. It is suggested that the superficial cells appear to represent the transitional stage in the keratinizing process, and had morphologically close resembrance to both the granular cells and the cornified ones in keratinized epithelia.
