The digestive system is where food is broken down, or digested. Its
organs include the mouth, esophagus, stomach, small intestine, large
intestine, rectum, and anus. The mouth, stomach, and the lining of the
small intestine contain tiny glands that produce juices to help digest
food. The liver and the pancreas also produce digestive juices that
reach the intestine and help the process of digestion.
Alcohol is not digested like other foods. Once alcohol is swallowed,
it travels down the esophagus into the stomach and the small intestine.
It avoids the normal digestive process and goes right into the
bloodstream. About 20 percent of the alcohol consumed is absorbed in the
stomach, and about 80 percent is absorbed in the small intestine.
One organ that is particularly affected by alcohol is the liver
because it is the main organ that processes alcohol. The liver weighs
more than three pounds and is the largest organ in the body. One of the
liver’s main jobs is to get rid of poisons—like alcohol—that enter the
body. Without the liver, you could not live.
Heavy drinking over a period of years can damage the liver. Some of
this damage comes from free radicals, a group of molecules that are
highly reactive. These molecules can attack the nearest stable molecule,
leading to a dangerous chain reaction that can result in a disease
called cirrhosis of the liver. Cirrhosis occurs when scar tissue
replaces normal, healthy tissue and the liver, which needs unrestricted
blood flow, doesn’t work as it should.