What is the function of the coronary ligament?

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The function of the coronary ligament is to suspend the liver from the diaphragm. These peritoneal reflections run from the liver's superior surface to the inferior surface of the diaphragm, surrounding the liver’s bare area and helping anchor it in place while allowing some movement with respiration. This arrangement keeps the liver properly positioned within the abdominal cavity.

It’s not a pathway for the hepatic artery (that travels in the hepatoduodenal ligament within the lesser omentum), nor does it connect the gallbladder to the liver (that connection is along the gallbladder bed and related peritoneal folds). It also doesn’t anchor the stomach to the liver.