when you eat to much, like more than your need, the mitochondria in your liver makes triglycerides to store the excess. Why is that storagge important? :S

Answer 1

Triglycerides are circulated to the body and oxidized to produce energy. Here is a site that talks about the storage and use of fat.
http://www.unisanet.unisa.edu.au/08366/h&p2fat.htm

Answer 2

Thanks Dr. Bob :)