If viewing a picture of the internal organs of a human lying in the supine position, the liver is the large, triangular organ in the upper quadrant of the body, to the direct upper left of the stomach and below the diaphragm. An average human liver weighs roughly three pounds and is split into two lobes connected by the coronary ligament.
The liver is located under the rib cage above the gallbladder and portions of the pancreas and small intestine. A healthy liver is a reddish-brown color and has a rubbery consistency, while a diseased liver, such as those with cirrhosis or hepatitis, is often dark and rigid with evidence of scarring. Those who suffer from fatty liver, or steatosis, will have a visible layer of fatty tissue on the liver. Many conditions that affect the appearance are tied to those with alcoholism.
The liver is a gland and the second largest organ in the human body. A key part of the digestive system, the liver helps filter toxins from the blood and metabolizes certain chemicals. The organ also secrets bile, an alkaline solution that further helps with digestion.
Some educational websites offer both printable worksheets and online quizzes that allow one to practice identifying the internal organs as well as the body's anatomic systems.