Wood cells of comparatively large diameter that have open ends and are set one above the other to form continuous tubes; the openings of the vessels on the surface of a piece of wood are usually referred to as pores.
Generally, this refers to a tube that carries liquid. In botany, it is usually used to refer to the xylem and phloem vessels that carry water and food around the body of a plant. In zoology, it may be used to refer to the vessels that carry lymph or blood around the body and to and from the heart.
(Botany). One of the tubular conductive structures of xylem, consisting of dead cylindrical cells that are attached end to end and connected by perforations. They are found in nearly all flowering plants.
The tube like structures in the circulatory system that are responsible for circulating blood within the body. The three kinds of vessels are arteries, veins and lymphatics. Capillaries are the microscopic structures that connect arteries and veins at the tissues.