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August Krogh Quotes

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Muscles do not use oxygen at a constant rate  (August Krogh Quotes) The respiratory mechanisms of birds are definitely adapted to the function of flight, as evidenced by the fact that birds which do not fly (Apteryx, Penguins) show these adaptations in a greatly reduced form.  (August Krogh Quotes) It is no doubt technically possible to study metabolism and respiration of fishes during swimming at a constant rate, and of certain insects and birds during flight, and to obtain information similar to that obtained on man during work on a bicycle ergometer or a treadmill.  (August Krogh Quotes) In many organisms, including man, the mechanical respiration and the circulation of the blood are ‘regulated’ so as to correspond to the demand of the moment.  (August Krogh Quotes) In many cases of inflammation, the vascular changes develop slowly and long after the application of the stimulus which is responsible for the inflammatory reaction.  (August Krogh Quotes) The circulatory system of man and the vertebrate animals can be considered as made up of a small number of organs or subordinate systems, which are easy to recognize anatomically, and the functions of which are on the whole quite distinct.  (August Krogh Quotes) In the numerous observations made in my laboratory upon this object, we have only once seen a combination of vessels in which there might be a direct communication between a small artery and a vein, though the two observers could not come to a final conclusion on the point.  (August Krogh Quotes) There can be little doubt that fishes swimming rapidly do not make respiratory movements at all, but obtain the necessary ventilation of the gills simply by opening the mouth.  (August Krogh Quotes) The theory of the lung as a gland has justified its existence and done excellent service in bringing forward facts, which shall survive any theoretical construction that has been or may hereafter be put upon them  (August Krogh Quotes) The absorption of oxygen and the elimination of carbon dioxide in the lungs take place by diffusion alone. There is no trustworthy evidence of any regulation of this process on the part of the organism  (August Krogh Quotes) In man, the mechanical breathing is essential to life, and it is one of the old tests for death to see whether these movements have ceased completely  (August Krogh Quotes) For a large number of problems there will be some animal of choice or a few such animals on which it can be most conveniently studied  (August Krogh Quotes)