Most of the liver is located in the right quaternary and supra-abdominal regions of the body, with a small portion located in the left quaternary region. Above the liver is the diaphragm, and below it are structures such as the gallbladder, stomach, duodenum, and colon. The liver is the largest metabolic organ and the largest gland in the human body, and is covered by the thorax consisting of the thoracic vertebrae, ribs, costal cartilage, sternum, and articular ligaments, and is exposed only in the supra-abdominal region between the left and right costal arches, in direct contact with the anterior abdominal wall. The upper border of the liver is in line with the diaphragmatic vault, the lower border is in line with the anterior border of the liver, the right side is in line with the right rib arch, the left side is covered by the rib arch, and the middle part is located about 3 cm below the raphe. The above is the anatomical part of the liver in the normal human body, if there are congenital abnormal anatomical position, when the actual situation shall prevail.