The intestines form the lower gastrointestinal tract, and they can be classified into two main divisions - small and large intestines.

The small intestine forms the upper section of the lower gastrointestinal tract. It is connected to the stomach and is longer and narrower. In contrast, the large intestine is shorter but wider, and it terminates in the anus.

The food is further broken down, and most nutrients are absorbed in the small intestine while the waste is passed on to the large intestine. Although there are no real separation marks between the small and large intestines, they are easily distinguishable. Both these parts have different characteristics, and they play slightly different roles.