The red section is the smooth muscle that contracts and creates the motion of peristalsis. And these individual spherical molecules are the fat globules. So fat globules are basically nothing more than the aggregation of cholesterol, triglycerides and other lipids that we ingest into our body. Now these very tiny blue regions, these structures are basically the pancreatic lipase, the proteolytic enzymes that break down our fats, the lipids into our fatty acids and glycerol. Now, lipase are water soluble and that means they cannot actually mix with the fat globules. Now the problem here is because of the very large size of the fat globules our livease molecules cannot actually access the inside portion of the fat globules because they cannot dissolve into these fat globules.