The cysteinyl - containing leukotrienes are potent bronchoconstrictors, increase vascular permeability in postcapillary venules, and stimulate mucus secretion. (science.sciencemag.org)
As the blood starts its journey back to the heart, the capillaries develop into the larger venules. (smallanimalchanel.com)
These high endothelial venules (HEVs) are normally found in lymphoid organs such as lymph nodes, where they help transport white blood cells. (sciencedaily.com)