How digested food is absorbed in small intestine ?

Explanation

Butter contains fat. Fats remain mostly undigested in stomach.
Digestion of fat in the small intestine : The major site of fat digestion is the small intestine. This is due to the presence of a powerful lipase(steapsin) in the pancreatic juice and bile juice. Bile juice contains bile salts such as Sodium/Potassium glycocholates and taurocholates, which helps in the emulsification of fat i.e., break down of fats into very small micelles. Bile also activates lipases of pancreatic juice (steapsin) and intestinal lipases. These lipases act on emulsified fats and convert them into fatty acids and glycerols.
Fats `overset(“Bile Salts”) to` Emulsified fats
Emulsified fats `overset("Lipases") to `
Monoglycerides`overset("Lipases")to` Fatty acids + Glycerol
Absorption : Fatty acids and glycerol being insoluble in water cannot be absorbed into the blood directly. They are first modified into small droplets called micelles, which move into intestinal mucosal cells. They are reformed into very small protein coated fat globules called chylomicrons, which are transported into the lymph capillaries in the villi by exocytosis. Then they are ultimately released into blood stream through left subclavian vein via the thoracic duct. These chylomicrons are broken down to fattyacids and glycerol by the action of an enzyme lipoprotein lipase and they diffuse into the adipocytes of the adipose tissue and liver for storage.