Rouget cells and their function

Abstract
Of recent years, owing to the work of Krogh and his collaborators, the idea that the contractility of blood capillaries resides in certain adventitial cells has been brought into prominence and has gained a wide acceptance. Vimtrup (5, 6, 7) succeeded in displaying, by histological methods, cells applied to the walls of capillaries. He stated that these cells were contractile, and that, by the shortening of their elongated processes, the capillary lumen was narrowed. These results were obtained, for the most part, in the frog, although analogous cells were described as existing on the capillaries of the mammalian skin.