glycolysisandall:

The image above shows an example of an amphiphile which is a term used to describe a chemical compound that contains both lipophilic (fat-loving) and hydrophilic (water-loving) properties.

A common and important class of amphiphillic molecules include phospholipids, which are the main component of cell membranes. The amphiphillic nature of these molecules actually defines the way in which the cell membrane is arranged. The arrangement of polar hydrophilic groups on the outside, so as to interact with the aqueous environment and non-polar lipophilic groups on the inside, away from the aqueous environment, hence forms the basis of the bilayer. 

Fun fact: the non-polar ends are used to create eicosanoids (eye-ko-san-oids). These eicosanoids are also known as Prostaglandins, Thromboxanes, and Leukotrienes. What are the purpose of eicosanoids you ask?

Well, they are primary contributors to pain signaling, inflammation response, and blod clot formation. Who would have thought that fats in your body were responsible for so much?