Their walls are composed of only a single cell thick layer of endothelial tissue, in  sharp contrast to their neighbors, which have a three layered wall structure. The  thickness of this wall, however, serves an important pur
Their walls are composed of only a single cell thick layer of endothelial tissue, in  sharp contrast to their neighbors, which have a three layered wall structure. The  thickness of this wall, however, serves an important purpose in the body, as it allows  diffusion by osmosis between this vessel and surrounding tissues. Arterioles and  venules diverge into these thinnest blood vessels. FTP, name these sites of gas and  nutrient exchange between body tissues.
Their walls are composed of only a single cell thick layer of endothelial tissue, in  sharp contrast to their neighbors, which have a three layered wall structure.