Blood vessel
The blood vessels are part of the circulatory system that transports blood throughout the human body.
Types
There are three major types of blood vessels: the artery, the capillaries, which enable the actual exchange of water and chemicals between the blood and the tissues; and the veins, which carry blood from the capillaries back toward the heart. The word vascular, meaning relating to the blood vessels, is derived from the Latin vas, meaning vessel. Avascular refers to being without (blood) vessels.
Tumor vessels are characterized by an increased vessel diameter, length, density and permeability. It has been revealed that the development and growth of the tumor neovasculature are tightly regulated by >19 angiogenic factors and 300 antiangiogenic factors 1)
Glioblastoma multiforme (Glioblastoma) is characterized by numerous abnormal blood vessels, which rapidly proliferate and invade brain tissue and express different angiogenic factors.