CHAPTER III.
THE EXOTERIC THEORY OF BREATH.
In this chapter we will give you briefly the theories of the Western scientific world regarding the functions of the respiratory organs, and the part in the human economy played by the breath. In subsequent chapters we will give the additional theories and ascertained facts of the Oriental school of thought and research. The Oriental accepts the theories and facts of his Western brothers (which have been known to him for centuries) and adds thereto much that the latter do not now accept, but which they will in due time "discover" and which, after renaming, they will present to the world as a great truth.
Before taking up the Western idea, it will perhaps be better to give a hasty general idea of the Organs of Respiration.
The Organs of Respiration consist of the lungs and the air passages leading to them. The lungs are two in number, and occupy the pleural chamber of the thorax, one on each side of the median line, being separated from each other by the heart, the greater blood vessels and the larger air tubes. Each lung is free in all directions, except at the root, which consists chiefly of the bronchi, arteries and veins connecting the lungs with the trachea and heart. The lungs are spongy and porous, and their tissues are very elastic. They are covered with a delicately constructed but strong sac, known as the pleural sac, one wall of which closely adheres to the lung, and the other to the inner wall of the chest, and which secretes a fluid which allows the inner surfaces of the walls to glide easily upon each other in the act of breathing.
The Air Passages consist of the interior of the nose, pharynx, larynx, windpipe or trachea, and the bronchial tubes. When we breathe, we draw iv the air through the nose, in which it is warmed by contact with the mucous membrane, which is richly supplied with blood, and after it has passed through the pharnyx and larynx it passes
