does it store blood?
Yes - about 450 milliliters in the hepatic veins and hepatic sinuses
Liver
Because the liver is an expandable organ, large quantities of
blood can be stored in its blood vessels. Its normal blood
volume, including both that in the hepatic veins and that in
the hepatic sinuses, is about 450 milliliters, or almost 10 percent of the body's total blood volume. 
what is hepatorenal syndrome? A life-threatening medical condition that consists of rapid deterioration in kidney function in individuals with cirrhosis or fulminant liver failure. how many types is it classified into? Two types -Type 1 HRS and Type 2 HRS what syndrome does type 1 include? UNANSWERABLE how can one identify this syndrome? Altered liver function, abnormalities in circulation, and kidney failure. how is the first part useful to the body? Detoxifies various metabolites; synthesizes proteins; produces biochemicals necessary for digestion and growth; regulation of glycogen storage ; decomposition of red blood cells; production of hormones.
wiki:2846054
Liver [SEP] Blood reservoir
Because the liver is an expandable organ, large quantities of blood can be stored in its blood vessels. Its normal blood volume, including both that in the hepatic veins and that in the hepatic sinuses, is about 450 milliliters, or almost 10 percent of the body's total blood volume. When high pressure in the right atrium causes backpressure in the liver, the liver expands, and 0.5 to 1 liter of extra blood is occasionally stored in the hepatic veins and sinuses. This occurs especially in cardiac failure with peripheral congestion. Thus, in effect, the liver is a large, expandable, venous organ capable of acting as a valuable blood reservoir in times of excess blood volume and capable of supplying extra blood in times of diminished blood volume.