The path of the respiration air with mouth and nasal breathing
With the nasal breathing the resistance that is posed towards the inhaled air is greater than with mouth breathing: through the nasal constriction and through several changes in direction within the three nasal conches of the nasal cavities. The nose and lower respiratory tract thereby represent sequential resistances. Deeper, longer and controlled inhalation and exhalation are the consequences. For the respiration muscles, especially the diaphragm, nasal breathing is stimulation and fitness training at the same time.
Breathing training and therapy make use of this understanding by training the diaphragm muscles through wilful constriction of one or both nostrils. Constriction of the nose during inhalation, like with sniffing inhalation, creates an extended or respectively slowed inhalation, constriction of the nose with exhalation creates a richer, deepened exhalation, which leads to an improvement in the gas exchange in the lungs. More intensive diaphragm oscillations downwards to the abdominal cavity during inhalation improve the blood circulation to our abdominal organs, and when the diaphragm swings back up into the chest cavity it substantially promotes the venous return circulation of blood to the heart. With all inhalation or exhalation movements of the respiration organs, low or respectively increased pressure arises in the blood vessels, especially in the venous system in the chest. During inhalation a suction force is created in the veins leading to the heart through the lower pressure, which normally sucks the amount of blood necessary to fill the circulation system towards the heart.
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Through mouth breathing it comes to astonishing deformations and changes of the face, above all to the nose, the jawbone and the facial expression, as Dr. Bahnemann/Eutin has been able to establish with children before and after the change-over from mouth to nasal breathing. The face forms differently with nasal breathing, it becomes more expressive, more lively, the nose more strongly shapes the facial expression.
Mouth breathing is therefore not destiny; the nasal breathing can for the most part be learnt again.
With the help of the following exercises and information you can once again initiate or improve the breathing through the nose and they will give you a greater sense for the construction and function of your nose and furthermore for inhalation and exhalation through the nose: