construction of the veins and arteries

adventitia anatomical anatomy aorta aortic arch arteriole artery basal biology blood bloodstream board body capillary cardiovascular cava cells circulation circulatory continuous didactic elastic endothelial endothelium externa external fenestrated health heart human inferior internal intima lamina large lumen media medical medically medicine medium membrane muscle organ physical physiology science sized smooth sporting stream system systemic tunica valve vascular vein vena venous venule vessels wall