The overall function of the digestive system is to take in the nutrients of the food we eat into our body and discard the waste. Lipase is used to digest fats there are three different types of lipase even though they all do the same thing. There is lipase (mouth) gastric lipase (stomach) and pancreatic lipase (pancreas).There are also two different types of amylase for carbs. There is amylase (mouth) and pancreatic amylase (pancreas). Something that confused us was that the small intestine is actually longer than the large intestine even though it was given these names. While the large intestine is only about 1.5 meters the small intestine is actually about 7 meters long! We want to know more about the wall of the stomach because we know it is very intricate. It just has so many layers maybe to protect the rest of your body from the hydrochloric acid? I wonder why the top of the stomach has indentations on the top called gastric pits?