Hard cells in the cavity protect the rope-like tender brain threads and prevent their rubbing action. Wounds may be caused at the time of rubbing (friction). This is avoided totally because of the ventricles hard stuff.

Now our brain has got numberless thin brain threads. The lobes inside the threads and the natural twisting of it project the various bulbs like shape of the bulging portion of our skull stuff.

The intermittent bulging bulb shape is full of electrical circuiting cells in the form of several threads. All these are functioning as electrical wires. This total circuit electricity is ready, alert and contacting the space electric waves and producing, receiving sparks. This is mainly to make alive and alert the total brain portion.

The hard cell portion in the cavity and the backside lower portion of the brain provide more powerful electricity.