Final answer:
Newly absorbed dietary fats are transported as chylomicrons in the lymph and blood, delivering triglycerides to tissues after digestion.
Step-by-step explanation:
Immediately after a meal, newly digested and absorbed dietary fats appear in the lymph and then the blood as part of chylomicrons. These are lipoprotein particles that transport dietary lipids from the intestines to other locations in the body. Dietary triacylglycerols are transported through the bloodstream in these chylomicrons. The chylomicrons encounter the enzyme lipoprotein lipase, which breaks down the triacylglycerols into fatty acids and glycerol. The breakdown products are then used for energy by cells or stored in adipose tissue as fat.
Inside the intestinal cells, free fatty acids and monoacylglycerides are recombined to reform triglycerides, which are then packaged with cholesterol molecules in phospholipid vesicles, forming chylomicrons. These vessels enable fats and cholesterol to move within the lymphatic and circulatory systems. After the chylomicrons are transported into the bloodstream, they deliver the triglycerides to various tissues in the body, such as the liver or adipose tissue, for storage or energy use.