What is the function of gallbladder in human body?

Its main function is storage and concentration. When bile secreted by the liver enters the gallbladder through the bile duct, thin bile is generally concentrated into gallbladder bile through dehydration of the gallbladder. Generally speaking, after fasting high-fat food and high-protein diet, patients' gallbladder will contract, and bile in gallbladder will be further excreted into bile duct and intestine, thus emulsifying fat and promoting protein's digestion and absorption.

Gallbladder is located behind the liver under the right rib of human body, with pear-shaped bag structure, which mainly plays the role of concentrating, storing, expelling bile, secreting mucus and regulating bile duct pressure. When the liver produces bile, part of it is consumed by the human body, and the other part is stored by the gallbladder, and then discharged by the gallbladder when it needs digestion, so the gallbladder is often called "bile warehouse". This can not only buffer the biliary tract pressure caused by one-time discharge of bile, but also absorb the beneficial components in concentrated bile into the human body. In addition, eating can excrete bile in the first time and consume fat in food.

The gallbladder condenses thin bile into thick, golden bile, which contracts when eating. This concentrated bile is discharged into duodenum through cystic duct and common bile duct, which is helpful for emulsification, digestion and absorption of fatty foods. The gallbladder also has a certain secretory function. For example, the gallbladder mucosa can secrete certain mucus to protect the mucosa epithelium of the gallbladder.

Gallbladder is mainly responsible for storing bile and assisting gastrointestinal tract to consume fat, so the health of gallbladder is closely related to the amount of fat ingested in the body. Usually, after eating foods containing fat, the gallbladder will discharge bile into the intestine, thus helping the body digest fat. In addition to fat, fat-soluble vitamins are also digested by gallbladder, such as vitamin K, vitamin D, vitamin A and vitamin E, which are all fat-soluble vitamins.

The most direct manifestation brought to people without gallbladder is decreased digestive function and anorexia to fatty foods. Because there is no concentrated bile entering the small intestine, the amount of bile acid will not reach the standard, leading to fat indigestion. In addition, a large amount of bile is discharged into the common bile duct, resulting in excessive pressure and dilatation of the bile duct. In addition, because bile contains a lot of trace elements, it plays an important role in human immune system. After resection, the balance of trace elements in human body will be broken, and the incidence of colorectal cancer, rectal cancer and choledocholithiasis will increase.