About 95% of saliva consists of water and that's because the process of hydrolysis that is catalyzed by amylase and lipase and other protein enzymes in our stomach as well as in our small intestine require water to actually break those bonds and that's why we have so much water in our saliva. Now, other components of saliva include these proteolytic enzymes, it includes glycoproteins, it includes mucus, it also includes special antibacterial molecules, enzymes such as lysozymes. These lysozymes basically attack and break down the cell walls of bacterial cells and that kills off our bacteria. Now, what saliva also does is it actually lubricates our bolus, our food and that allows the movement of the bolus along Aristophagus with a minimal amount of friction and that ensures that the movement of arabolis along the esophagus doesn't actually hurt, it is not actually painful. Now let's move on to our pharynx. The pharynx is basically the passageway that connects our oral as well as nasal cavity to our windpipe as well as to our esophagus.