Breathing Capacity of Lungs. –the breeding capacity of the lungs bears a close correspondence to the stature of man. For an ordinary sized man of about 5′8″ in height, it will be 230 cubic inches, or about 1 gallon of air, and for each additional inch of stature up to 6 feet, there will be [...]

Breathing.–Respiration, or the act of breathing, consists of thealternate inspiration and expiration of air to and from the lungs; in the process of which the lungs themselves are almost passive managements, since their contraction expansion takes place by means of the muscles which surround the chest. The diaphragm or midriff, which, when at rest in [...]