7. New Stomach
Though it may sound strange but it is a fact that the stomach keeps changing every three to four days. The stomach has a lining which gets changed every three to four days, which is equivalent to getting a new stomach. The reason for this change is the strong acid that the stomach produces to break down the food and digest it. Had it not been for the new lining every three to four days, the acid would have digested the stomach itself.
