As humans manifest a more pronounced light body, most of these organs and glands will no longer be needed, and may gradually atrophy and disappear.
In the mean time, it is important to acknowledge the changes taking place in the body and to support the physical body as much as possible As more and more light becomes available, the intensity of electromagnetic energy around you also increases.
This means that there will be more rapid neurological activity in the body resulting in higher intensity impulses firing the central nervous system.