The Diaphragm And Its Functions Considered Specially in Its Relation to Respira
The Diaphragm And Its Functions Considered Specially in Its Relation to Respira
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45 the effete air from the lungs. This elastic recoil is amply sufficient to produce moderately loud vocal effects. The action is analogous to that of one of those squeaking toys, which are furnished with an elastic rubber-bag that may be blown up, and, when contracting, forces out the air and produces the ear-offending squeak that seems to give pleasure to the juvenile mind. It must be noted that this elastic recoil is assisted by the return to their position of the abdominal organs that have ...been displaced by the contraction of the diaphragm.
Forced expiration, such as is required in loud or long-prolonged tones, etc. , brings into action certain other muscles. These are the triangularis stern i, the effect of whose contraction is to pull down the costal cartilages and the abdominal muscles. These latter are the principal agents used in forced expiration. By their contraction, they pull down the sternum and the middle and lower ribs, and thus lessen the antero-posterior cavity of the chest, and, by pressing on the contents of the abdomen, thrust those organs and the dia- phragm up into the chest-cavity, and thus shorten its vertical diameter.
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You can find similar books in the "Read Also" column, or choose other free books by Joseph Moses Ward Kitchen to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
45 the effete air from the lungs. This elastic recoil is amply sufficient to produce moderately loud vocal effects. The action is analogous to that of one of those squeaking toys, which are furnished with an elastic rubber-bag that may be blown up, and, when contracting, forces out the air and produces the ear-offending squeak that seems to give pleasure to the juvenile mind. It must be noted that this elastic recoil is assisted by the return to their position of the abdominal organs that have ...been displaced by the contraction of the diaphragm.
Forced expiration, such as is required in loud or long-prolonged tones, etc. , brings into action certain other muscles. These are the triangularis stern i, the effect of whose contraction is to pull down the costal cartilages and the abdominal muscles. These latter are the principal agents used in forced expiration. By their contraction, they pull down the sternum and the middle and lower ribs, and thus lessen the antero-posterior cavity of the chest, and, by pressing on the contents of the abdomen, thrust those organs and the dia- phragm up into the chest-cavity, and thus shorten its vertical diameter.
What to read after The Diaphragm And Its Functions Considered Specially in Its Relation to Respira?
You can find similar books in the "Read Also" column, or choose other free books by Joseph Moses Ward Kitchen to read onlineMoreLess
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