August Krogh quotes

August Krogh was a Danish physiologist renowned for his discoveries in the regulation of capillaries and blood circulation. His research greatly advanced our understanding of how oxygen is delivered to tissues in the body. He was awarded the Nobel Prize in Physiology or Medicine for his groundbreaking work. Here are 7 of his 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)
Muscles do not use oxygen at a constant rate. View quote
August Krogh
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. View quote
August Krogh
In the giraffe with a total height of 5 m., the heart is at a height of about 2.5 m., and it would be extremely interesting to know just how the giraffe avoids the development of filtration oedema in its long legs. View quote
August Krogh
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. View quote
August Krogh
The affinity of blood or pure haemoglobins for oxygen is a complex phenomenon, depending upon a number of conditions, the most important of which are temperature and hydrogen ion concentration. View quote
August Krogh
I found it possible to observe at least the superficial capillaries of muscles both in the frog and in mammals through a binocular microscope, using strong reflected light as a source of illumination. Resting muscles observed in this way are usually quite pale, and the microscope reveals only a few capillaries at fairly regular intervals. View quote
August Krogh