The study includes the blood vessels of the liver fromdifferent aspects.These aspects involve the anatomy, the changes in differentliver diseases and finally the evaluation of this vascular systemfrom the study, we found that the vascular system of the liver isvery important in the pathogenesis of many lier diseases and alsoaffected by some systemic diseases. The vascoler system of theliver can be evaluated by many methods and techniques. Theseinvestigations may be invasive or non invasive.With development of the radiological methods, many noninvasive techniques are devolved such as Doppler ultra sound andmagnetic resonance angiography. At last, we can say that themaintenance of normal function of the liver depends, to a greatdegree, on the maintenance of normal anatomy of the bloodvessels of the liver.