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… — August Krogh Copy Share Image
The circulatory system of man and the vertebrate animals can be considered as made up of a small number of organs or subordinate systems,… — August Krogh Copy Share Image
The affinity of blood or pure haemoglobins for oxygen is a complex phenomenon, depending upon a number of conditions, the most important of which… — August Krogh Copy Share Image
The most direct evidence of the wonderful plasticity and elasticity of red corpuscles is obtained when they are watched in a current, where they… — August Krogh Copy Share Image
When a suitable quantity of India ink is introduced into the circulation of a living anaesthetized animal, it is evenly mixed with the blood,… — August Krogh Copy Share Image
In the numerous observations made in my laboratory upon this object, we have only once seen a combination of vessels in which there might… — August Krogh Copy Share Image
In the tissues generally, and in such a cavity as the abdomen, the pressure is everywhere and practically always very nearly atmospheric, and must… — August Krogh Copy Share Image
Since muscular contractions are usually more or less regularly alternated with relaxations, the system of valves makes of the veins of every muscle a… — August Krogh Copy Share Image
The theory of the lung as a gland has justified its existence and done excellent service in bringing forward facts, which shall survive any… — August Krogh Copy Share Image
We may fondly imagine that we are impartial seekers after truth, but with a few exceptions, to which I know that I do not… — August Krogh Copy Share Image
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… — August Krogh Copy Share Image
In many organisms, including man, the mechanical respiration and the circulation of the blood are 'regulated' so as to correspond to the demand of… — August Krogh Copy Share Image
The respiratory mechanisms of birds are definitely adapted to the function of flight, as evidenced by the fact that birds which do not fly… — August Krogh Copy Share Image
