To create the model of the lungs, their anatomic structure and physiology should be considered. The maximum attention should be given to consideration of physiology of breathing, since speech is the process accompanying the exhalation. Furthermore, the important features of human speech formation are neurobiological processes. When considering the lungs, attention must be paid to the function of the lungs as a part of the human respiratory system. According to [1–5], the lungs have the cone shape whose apex is turned up and the basis lies on the diaphragm. The external, forward, and backward surfaces of the lungs adjoin the internal surface of the thorax. The internal surface of the lungs is turned to mediastinum and adjoins its organs. The right lung is divided into three lobes, and the left lung is divided into two lobes. The lungs lie in the chest cavity on both sides of the heart. Each lung is enclosed in a thin-walled bag formed by thin, damp, and lustrous membranes – pleurae – continuously transforming one into another: visceral into parietal one. The pleural cavity which is a slit-like contains a small amount of the pleural fluid that plays the role of a lubricant during continuous respiratory motion of the lungs. Each lung contains bronchial ducts forming the original skeleton of the body – the bronchial tree – and the system of pulmonary sacks, or alveoli, which are respiratory (gas-exchange) organs of the respiratory system. Air freely passes through the respiratory tract, since walls of the respiratory ducts do not collapse due to the hyaline cartilage presented in them. The lungs are the main organs of the respiratory system. The volume of the lungs is changed by the thorax with muscles and the diaphragm. The thorax is a bony-muscular armor protecting the trachea, bronchial ducts, lungs, and heart from external damages. In addition, pectoral muscles actively participate in breathing. Rhythmical movements of the thorax provide ventilation of the lungs, that is, filling them by atmospheric air during the inhalation and expiring from them the alveolar air enriched with carbonic gas and poor with oxygen during the exhalation. The most part of the ventilation is provided by the main respiratory muscle – the diaphragm. The cycle of breathing consisting of inhalation and exhalation of the adult human at rest is repeated 14–18 times per 1 min. During sleeping, breathing is less often, and during hard working, it becomes much more frequent. The processes of breathing are regulated by the special organ of the central nervous system – the respiratory center. The paired respiratory center comprises two centers: inspiratory and expiratory ones. Nervous impulses arising in the respiratory center every 4 s cause the contraction of the diaphragm and other respiratory muscles. It is expedient to adjust the respiratory inhalation–exhalation cycle to the muscular activity of the human body (for example, with its