So the acidity of the stomach is about two. And this activates special types of proteolytic enzymes that begin the breakdown of proteins into their smaller constituents. Now, although some substances, such as alcohol can be absorbed by the cells of the stomach, the stomach acts mostly in mechanical and chemical digestion. Now, let's move on to our small intestine. So basically, the food goes into the oral cavity, travels into the pharynx, the epiglottis blocks it from going into our windpipe that is found here not shown, it goes into our esophagus. We have special types of sphincter muscles that open up and allow the movement of our food into the stomach, inside the stomach, and then goes into this section, the small intestine.