From the beginning of the evolution, the brainy creatures and we are so much careful about our safety.

Safety is first and thinking is second for the survival of the life. This same nature is good at all times. But man must think and decide when and how to use that safety nature of us.

As we are having this nature of the lobes for our safety in the sense we feel its obstruction at the time of thinking.

In our brain each and every bunch of threads are twisted and it is well arranged in the skull. This is also called as brain stuff. In-between the twisted portion, there are so many ventricles. It is a cavity. Its terminology is ventricles.

These cavities are all filled by so many hard cells. Because of these cavity cells, the organ arrangement is visible.