Fat is first emulsified by bile. It becomes soluble in water, and then is easily broken down by pancreatic and intestinal lipase. Inside these cells, the micelles are repackaged into chylomicrons which are absorbed into the lymph system. They are classified according to density. If it weren't for lipoproteins, fats circulating in the bloodstream would rise to our heads.
Chylomicrons are mostly triglycerides.
They transport the end products of fat digestion to the heart and general circulation by way of the lymph system. They transport triglycerides synthesized by the liver to body tissues. N ormally, enzymes in the liver break down chylomicrons within a few hours. Fatty acids and glycerol can be reassembled into triglycerides, or used to meet the energy needs of the liver, or sent back to the blood stream for use by cells throughout the body. Fatty acids can be used to make cholesterol.