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 animalchoiceconveniently Change image and share on social
Muscles do not use oxygen at a constant rate. August Krogh constantmuscleoxygen Change image and share on social
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 anatomicallyanimalcirculatory share on social
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 bloodcirculationcorrespond Change image and share on social
In the tissues generally, and in such a cavity as the abdomen, the pressure is everywhere and practically always very nearly atmospheric, and must be so, because the integuments give way very easily to any excess of pressure, whether positive or negative. August Krogh abdomenatmosphericcavity share on social
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 breatheceasecompletely Change image and share on social
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 bicyclebirdconstant share on social
