Carbonic acid in medicine / by Achilles Rose, M.D. ; with the portraits of van Helmont, Priestley and Lavoisier.

  • Achilles Rose
Date:
1905
Catalogue details

Licence: Public Domain Mark

Credit: Carbonic acid in medicine / by Achilles Rose, M.D. ; with the portraits of van Helmont, Priestley and Lavoisier. Source: Wellcome Collection.

Provider: This material has been provided by the Francis A. Countway Library of Medicine, through the Medical Heritage Library. The original may be consulted at the Francis A. Countway Library of Medicine, Harvard Medical School.

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    blood of the arteries by means of the exhaust- pump. The mass of inspired air has to be divided, in regard to its action on the renewal of the air in the alveoli, into two parts. A certain amount remains in the upper air-passages and is re- moved again by expiration. The rest enters into the alveoli to mix with the air which is already there. On account of the smallness of each single infundibulum, it is likely that the diffuse mixture of old and fresh air takes place instantaneously, while the bronchial tubes are too long to allow the exchange of their gases with those of the alveoli by diffusion, which could hardly be accomplished in the time be- tween two respirations. The next process in respiration is that air from the alveoli takes the place of the expired contents of the bronchi, and only when the ex- tent of the expiration exceeds in volume that of the air-passage will alveolar air pass out di- rectly. The movements of respiration, there- fore, can have but little success when the vol- ume of each expiration does not exceed that of [19]