CHAPTER V.
THE NERVOUS SYSTEM.
It will be noticed that the Western scientific theories regarding the breath confine themselves to the effects of the absorption of oxygen, and its use through the circulatory system, while the Yogi theory also takes into consideration the absorption of Prana, and its manifestation through the channels of the Nervous System.

Before proceeding further, it may be as well to take a hasty glance at the Nervous System.
The Nervous System of man is divided into two great systems, viz., the Cerebro-Spinal System and the Sympathetic System.

The Cerebro-Spinal System consists of all that part of the Nervous System contained within the cranial cavity and the spinal canal, viz., the brain and the spinal cord, together with the nerves which branch off from the same.

This system presides over the functions of animal life known as volition, sensation, etc.

The Sympathetic System includes all that part of the Nervous System located principally in the thoracic, abdominal and pelvic cavities, and which is distributed to the internal organs.