Dr. Oz introduces Oprah to an omentum.

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Question 5: Which of the following stores fat?
A) The sciatic nerve
B) The omentum
C) The duodenum

The correct answer is B.

The omentum is the fat organ connected to your stomach that only has one purpose—catching and storing fat.

Once your omentum becomes large, can you shrink it? "Absolutely. That's the whole purpose of the omentum," Dr. Oz says. "We're born with omentums that we can store fat in, so we're supposed to be able to have it get bigger and smaller."