Scanning electron microscopy of the wall of the blood vessels in rat incisor pulp.

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The wall of the blood vessels in rat incisor pulp were investigated by the scanning electron microscopy of the HCl-collagenase method. The central arteries were covered by two or more compact layers of the smooth muscle cells. They were spindle-shaped or starlike and circularly oriented. There were two types of the surface contours in these central arteries. One was the type of the smooth contour and the other was rough like a screw. The arterioles (10-15μm in diameter) were covered by one or two compact layers of the spindle -shaped or starlike smooth muscle cells which were circularly oriented. The capillaries were studded with the pericytes having a few processes less than 10μm in length. The venules were studded with the pericytes having longitudinally oriented primary processes more than 20μm in length. These processes had many secondary processes which were circulary oriented. The central veins were covered by the loose net consisting of the spidery pericytes. These pericytes were in grooves of the endothelial cells.
歯科基礎医学会の論文