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without being completely broken down into fatty acids and glycerol because fat is lipid soluble. Fat is further acted upon by bile which is produced in the liver and stored in the gall bladder, a small organ on the liver's surface. When food enters the small intestine, the gall bladder contracts and forces bile down the bile duct into the small intestine. Bile, which is not an enzyme but a solution containing bile salts, bile pigment, and cholesterol, emulsifies fats into small droplets, increasing the surface area on which lipase can act. Bile also aids in the absorption of fats by the small intestine wall. The intestinal glands secrete the enzymes maltase, sucrase, and lactase that split the double sugars maltose, sucrose, and lactose, respectively, into glucose, thus completing the breakdown of sugars. In addition, the intestinal glands secrete 
