Word: carbon
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Dates: during 1930-1939
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Consequences of Professor Henderson's emphasis of the necessity of carbon dioxide in breathing are many. With able Assistant Professor Howard Wilcox Haggard, he has demonstrated them...
...lungs, however, do not exhale all the carbon dioxide in the body. There is normally a residue. That residue of carbon dioxide in the blood is one of the things which, Professor Henderson has demonstrated, the respiratory system absolutely needs to keep the lungs pumping...
...lungs are expanded because the ribs rise & fall and the diaphragm ascends & descends. The muscles which operate the ribs and diaphragm are controlled, through the agency of nerves, by the respiratory centre in the lower brain, which needs carbon dioxide for stimulation. (Infantile paralysis often injures the spinal cord nerves which go to muscles used in respiration. In certain cases the injured nerves may regenerate, while the victim's life is maintained in a respirator...
Thus, after certain operations (particularly of the abdomen), after anesthesia, asphyxia or apparent drowning, tiny recesses of the lungs may be plugged. The lungs may partially collapse. Secondary pneumonia often results. Carbon dioxide may stimulate the lungs to deep, full inhalation. In fact, wrote Professor Henderson in the Yale Journal of Biology & Medicine, "It appears that this is probably a specific treatment against all secondary pneumonia...
Thorough ventilation by means of carbon dioxide sustains the system until the effects of carbon monoxide wear off. Narcotics like morphine depress respiration...