Fats supply energy, cushion vital organs and protect them from injury, add flavor to food and move through the system slowly you feel fuller longer.

Digestive system

Explanation:

Fat carries out many functions in the body of organisms. They are great source of energy especially when less amount of glucose is present in the body. They act as pads to many structures in the body.

Their roles in adding flavor to food is highly emphasized and their vehicular role in moving food in the gut have helped greatly in acquisition of nutrients by organisms

to this answer it would be edge enhancement