(anatomy) Of, pertaining to, or containing vessels that conduct or circulate fluids, such as blood, lymph, or sap, through the body of an animal or plant.
2013-03, Nancy Langston, Mining the Boreal North, Reindeer are well suited to the taiga’s frigid winters. They can maintain a thermogradient between body core and the environment of up to 100 degrees, in part because of insulation provided by their fur, and in part because of counter-current vascular heat exchange systems in their legs and nasal passages.
