The Normal Ultrastructure of the Murine Endolymphatic Sac

Abstract

The normal ultrastructure of the murine endolymphatic sac was studied by transmission electron microscopy. The epithelial cells in the intermediate portion of the sac were classified into two types. One was characterized by many mitochondria, microvilli, coated pits, vesicles, vacuoles, multivesicular bodies and lysosomes. The other was charactarized by a few of them. Extremely widened lateral intercellular spaces and apparent dark cells were not observed.