Proctitis is an inflammation of the anus and the lining of the rectum, affecting only the last 6 inches of the rectum.
The liver lies on the right side of the abdominal cavity beneath the diaphragm. Blood is carried to the liver via two large vessels called the hepatic artery and the portal vein. The heptic artery carries oxygen-rich blood from the aorta (a major vessel in the heart).
Located in the RUQ, the liver is the largest solid organ in the body. It has a capsule with many nerve endings located along the surface. Conditions that stretch the liver capsule often trigger pain. Liver inflammation, or hepatitis, can develop from numerous causes.