We have our fatty acids that we can ingest. We can also ingest phospholipids. So basically, each one of these lipids serves its own unique purpose. For example, phospholipids and cholesterol are found in our membrane, while our fatty acids and triglyceride, triglycerides is the form that we store our fats inside our adipose cells. And fatty acids are those lipids that we use to actually break down and for ATP. So because lipids do not actually dissolve in water, and because the majority of the body and the cells are composed of water, that means lipids do not dissolve in our blood.