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You are here: BBC Science > Human Body & Mind > The Body > Organs
Fact files

Organs - Gall bladder

System: Digestive

Location: On the underside of your liver

Physical description: Pear-shaped, green, muscular sac

Function: To store and concentrate bile produced in your liver

Storing and concentrating bile

Bile is a greenish-yellow, slightly acidic fluid that is made in your liver. You produce about one litre of it a day.

Bile is stored in your gall bladder and once it gets there, it is concentrated by the removal of water.

Breaking down fats

After a meal, your gallbladder contracts, squeezing bile into your small intestine. Bile breaks down fat in the food you eat.

Gallstones

Most gall bladder disorders are due to the presence of gallstones. Gallstones form when cholesterol, one of the components of bile, crystallises to form a stone-like material.

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