抄録
Mouse endolymphatic epithelial cells, a layer of flat epithelial cells, were distributed on the endolymphatic surface of the mouse endolymphatic duct. The loose connective tissue was noted and irregularly protruded toward the basement membrane of the epithelial cells. It was occasionally found that both epithelial cells and the loose connective tissue protruded markedly toward the endolymphatic spaces. Consequently narrowing of endolymphatic lumen was noted in several places. There was a blood vessel, which was relatively large 40μ in diameter, running alongside the endolymphatic duct. Considering close, special arrangement of this blood vessel and endolymphatic duct, we suggested that this blood vessel played a role of fluid metabolism of the endolymphatic duct.