Digestion Lab

This lab was completed to observe how substances in your stomach work together to digest food. Each of the four test tubes represented a stomach. In test tube A was pepsin, which is a control. This means that it is a significant component in the digestion process. In test tube C was hydrochloric acid, which is also a control. In test tube B was a mixture of pepsin and water, while test tube D contained a mixture of hydrochloric acid and pepsin. Also, in each test tube were three cubes of egg whites, being the food that would be digested. The "digestion system" that was most successful was the one in test tube D. This is because the two controls together make for a faster digestion. Controls, by themselves, can not function correctly; they need support from eachother or another substance, such as water. This lab allowed us to see a model of the digestion system in action and how it really works.