In the following brainstem labeled diagram, we see Thalamus, Midbrain, Pons, Medulla, and Spinal Cord. As illustrated here, Midbrain, Pons, Medulla, and Spinal Cord all come under the Brain Stem. The purpose of a labeled diagram is very simple -- provide the context of a diagram to the viewer. Since it becomes difficult for the readers to understand the diagram without context, labeling them would be an important key here. Diagrams range in complexity from very simple to deeply intricate, and so labeling diagrams is an activity that is appropriate at all grade levels and in many subject areas. As you saw here, creating a labeled diagram is very important for academic purposes. With the help of EdrawMax Online, you can easily create one and share it with your friends. At EdrawMax Online, you can change the font or the font size as per your requirement.