Vascular System
that portion of the interior of a plant in which spiral vessels or their modifications exist. In an exogenous stem, the vascular system is confined to the space between the pith and the bark. It chiefly consists of ducts and pitted or woody tissue collected into compact, wedge-shaped, vertical plates, the edges of which rest on the pith and the bark, while the sides are in contact with the medullary rays. It comprises the medullary sheath, which consists of spiral vessels and woody tissue intermixed. In an endogenous stem, the vascular system exists in the form of fibrous bundles, consisting of woody tissue containing spiral or other vessels, the whole imbedded in the cellular system.
VASE In comparative anatomy, the circulatory system. A term applied to the whole series of vessels arteries, veins, lymphatics, and lacteals-directly or indirectly connected with the circulation CHELSEA VASE of the blood. The vessels of which it is composed are of two leading types-those which carry blood, and those carrying lymph or chyle. The first constitute the sanguiferous system, and include the heart, the arteries, the capillaries, and the veins. The second or absorbent system includes the smaller and larger lymphatic and lacteal vessels, with the lymphatic and mesenteric glands.