So we see that in our stomach we have the process of mechanical digestion taking place as a result of that continuous movement of our fluid and the contraction of our smooth muscle in our stomach that allows mechanical digestion to actually take place. So we further break down our food into smaller particles. Now inside our stomach we also break down our macromolecules. We break down the protein into smaller peptides as a result of those proteolytic enzymes specifically the pepsin the enzyme that cleaves the peptide bonds in our proteins. Inside the stomach we have a very low PH and that denatures our proteins and allows Pepsin to actually cleave those bonds. And this hydrochloric acid also basically kills off bacterial cells that enter our stomach with our food.