Fig.10.
Arteriole and venules in the subendocardium of an adult dog. The microvasculature is filled with silicon elastomer and the tissue cleared by immersion in methylsalicylate. The ventricular cavity is below. In the right upper region is a 25μm arteriole, A, separated by 30 to 50 μm from venae comitantes, V, one about 4.5 μm and the other about 25 μm in diameter. Along the left side and below are a Thebesian vein and its branch, TV.