ANATOMY

Detailed explanation-1: -What are gallstones? Gallstones form when bile stored in the gallbladder hardens into stone-like material. Too much cholesterol, bile salts, or bilirubin (bile pigment) can cause gallstones. When gallstones are present in the gallbladder itself, it is called cholelithiasis.

Detailed explanation-2: -Normally, your bile contains enough chemicals to dissolve the cholesterol excreted by your liver. But if your liver excretes more cholesterol than your bile can dissolve, the excess cholesterol may form into crystals and eventually into stones.

Detailed explanation-3: -Type and composition-Gallstones are composed of a mixture of cholesterol, calcium salts of bilirubinate or palmitate, proteins, and mucin.