Biliary tract

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The biliary tract, biliary tree, or biliary system refers to the liver, gallbladder and bile ducts, and how they work together to make, save and hide the gall. Bile consists of water, electrolytes, bile acids, cholesterol, phospholipids, and conjugated bilirubin. Some components are synthesized by hepatocytes (liver cells), the rest are extracted from the blood by the liver.

The bile is secreted by the liver into small ducts that combine to form a common liver channel. Between meals, the secreted bile is stored in the gallbladder. During feeding, bile is secreted into the duodenum to rid the body of impurities stored in bile and also helps in the absorption of fats and food oils.

Video Biliary tract

Structure

The bile duct refers to the path where the bile is secreted by the liver and then transported to the duodenum, the first part of the small intestine. A common structure for most mammalian family members, the bile duct is often referred to as a tree because it starts with many small branches ending in the bile ducts, sometimes referred to as bile tree trunks. Channels, branches of the hepatic artery, and portal vein form the central axis of the portal triad. Bile flows in the opposite direction of blood flow in the other two channels.

These systems are usually referred to as bile ducts or systems, and may include the use of the term "hepatobiliary" when used to refer only to the liver and bile ducts. The name of the bile ducts is used to refer to all the channels, structures and organs involved in the production, storage and secretion of bile.

The tract is as follows:

• Bile canaliculi & gt; & gt; Channels & gt; & gt; intrahepatic bile ductule (in portal channel/triad) & gt; & gt; interlobular bile ducts & gt; & gt; left and right heart ducts & gt; & gt;
• This merges to form a common heart channel
• This comes out of the heart and joins the cystic channel of the gallbladder
• Together, this forms a common bile duct that joins the pancreatic ducts
• This passes the Vater ampules and enters the duodenum

Maps Biliary tract

Function

The bile is secreted by the liver into small ducts that combine to form a common liver channel. In between meals, the secreted bile is stored in the gallbladder, where 80% -90% of water and electrolytes can be absorbed, leaving bile acids and cholesterol. During the meal, smooth muscles in the contract of the gallbladder wall, causing bile secreted into the duodenum to rid the body of the dirt stored in bile and help the absorption of fats and food oil by dissolving it using bile acids..

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Clinical interests

The pressure inside the gall trees can cause gallstones and lead to liver cirrhosis.

The bile duct can also serve as a reservoir for intestinal tract infections. Since the bile duct is an internal organ, it has no supply of somatic nerves, and biliary colic due to infection and inflammation of the bile ducts is not somatic pain. Conversely, pain can be caused by luminal distension, which causes the stretch of the wall. This is the same mechanism that causes pain in intestinal obstruction.

Blockage of bile ducts can cause jaundice, skin and eyes to yellow.

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References

Source of the article : Wikipedia