Well, here's 2 facts that they use repeatedly: 1  In order to build muscle, you need to consume excess calories. 2  In order to lose fat there must be a calorie deficit.
In human anatomy, the mouth is the first portion of the alimentary canal that receives food and saliva. The oral mucosa is the mucous membrane epithelium lining the inside of the mouth.
The cells in your mouth are almost the same as the cells in the rest of your body except with different DNA (allows them to do different jobs). Enzymes make the food break down . Also, there may be some bacteria in there. Hope this helped ;D.