The liver is a very large organ, the largest and heaviest in the body, weighing in a healthy adult from three to four pounds. It secretes the bile. Its cells also store up, "in the form of a kind of animal starch called glycogen," excess of starchy or sugary food absorbed from the intestine during the digestion of a meal. This it gradually doles out to the blood for general use by the organs of the body until the next meal is eaten. Dr. William Hargreaves says:-- "The office of the liver is to take up new substances having not yet become blood, as well as the portions of integrated matter that can be worked over, and brought again into use. It is in fact the economist of the system. It excretes bile, and liver-sugar, and _renews_ the _blood_. When the liver is disordered the whole body is more or less deranged and the proper nutrition of its parts arrested." Dr. Alfred Carpenter says:-- "The liver has to do several things; a considerable part of its duty is to purify the blood from _debris_ (waste matter), to filter out some things, to break up and alter others, and to expel them from the body in the form of bile. There are certain diseases in which the liver suddenly declines to do any more work. Acute atrophy of the liver is the name of this condition, and when it arises death rapidly results from suppression of the secretion of bile. It brings about a state of things called _acholia_; the patient is actually poisoned by the non-removal of those ingredients from the blood which it is the duty of the liver to remove. This corresponds in effect to the condition which alcohol can bring about by slow degrees." The liver is the first important organ, next to the stomach and bowels, to receive the poisonous influence of alcohol. "If alcohol is used habitually, though only in small quantities at a time, the liver may become the seat of serious changes. There may be a great increase of fat deposited in the cells, producing what is called 'fatty liver,' or it may lead to a great increase of connective tissue (membrane) between the cells, and surrounding the blood-vessels. This newly-developed connective tissue gradually contracts, and in so doing crushes the cells and obstructs the blood-vessels, making the organ much smaller than natural, and causing the surface to be covered with little projecting knobs, consisting of portions of liver-tissue that have been less compressed than the part that separates them. The pressure upon the liver-cells and the destruction of many of them, prevents the proper formation of bile and liver-sugar. The contraction of the newly-developed tissue, by obstructing the blood-vessels, interferes with the circulation. Malt liquors seem to produce fatty degeneration, while the stronger liquors cause the development of connective tissue."--_Tracy's Physiology._