ribs," because they are not so fastened, the upper two of them being fastened by cartilage to the other ribs, the remainder having no cartilages, their forward ends being free.
The ribs are moved in respiration by two superficial muscular layers, known as the intercostal muscles. The diaphragm, the muscular partition before alluded to, separates the chest box from the abdominal cavity.
In the act of inhalation the muscles expand the lungs so that a vacuum is created and the air rushes in in accordance with the well known law of physics. Everything depends upon the muscles concerned in the process of respiration, which we may, for convenience, term the "respiratory muscles." Without the aid of these muscles the lungs cannot expand, and upon the proper use and control of these muscles the Science of Breath largely depends. The proper control of these muscles will result in the ability to attain the maximum degree of lung expansion, and to secure the greatest amount of the life giving properties of the air to the system.
The Yogis classify Respiration into four general methods, viz.:
(1) High Breathing.
(2) Mid Breathing.
(3) Low Breathing.
(4) Yogi Complete Breathing.
We will give a general idea of the first three methods, and a more extended treatment of the fourth method, upon which the Yogi Science of Breath is largely based.
