A grasp of psychology is also important in designing a good game; you want to know how players will feel at every point in the game. And it is vitally important that you can explain rules clearly in plain English.
The stomach's main function is digestion. It does this by: The stomach uses pepsin (enzyme) and peptidase (another enzyme) to break down proteins in your food. The acid released by the stomach doesn't break down food it only provides a good environment for the enzymes to work in.
The enzymes that are secreted in the stomach are called gastric enzymes. The stomach plays a major role in digestion, both in a mechanical sense by mixing and crushing the food, and also in an enzymatic sense, by digesting it. Pepsin breaks down the protein in the food into smaller particles, such as peptide fragments and amino acids. 2  Protein digestion, therefore, first starts in the stomach, unlike carbohydrate and lipids, which start their digestion in the mouth.