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Muscles do not use oxygen at a constant rate.
August Krogh / Researcher
Constant
Muscles
Oxygen
Rate
Use
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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 / Researcher
Animal
Conveniently
Large Number
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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 / Researcher
Men
Breathing
Essentials
Life Death Man
Essential
Mechanical
Movements
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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 / Researcher
Blood
Circulation
Demand
Including
Organisms
Respiration
Correspond
Mechanical
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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 / Researcher
Application
Cases
Stimulus
Slowly
Reaction
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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 / Researcher
Fishes
Opening
Respiratory
Swimming
Mouth
Obtain
Rapidly
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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.
August Krogh / Researcher
Affinity
Concentration
Hydrogen
Oxygen
Phenomenon
Pure
Temperature
Complex
Depending
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The tremendous honour of the Nobel Prize is of the strongest incentive to me in my work, while the amount of the Prize will greatly simplify my task and provide me with much valuable help in my work.
August Krogh / Researcher
Honour
Nobel
Nobel Prize
Prize
Valuable
Tremendous
Work Me Help
Greatly
Incentive
Task
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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 / Researcher
Science
Oxygen
Regulation
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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 / Researcher
Adaptation
Flight
Form
Function
Respiratory
Definitely
Fact
Greatly
Mechanisms
Reduced
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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 / Researcher
Science
Facts
May
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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.
August Krogh / Researcher
Development
Giraffe
Height
Interesting
Legs
Total
Extremely
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Since muscular contractions are usually more or less regularly alternated with relaxations, the system of valves makes of the veins of every muscle a very effective pump, capable of maintaining a low pressure in the muscle capillaries.
August Krogh / Researcher
Capable
Maintaining
Veins
Muscle
Effective
Low
More Or Less
Pump
Regularly
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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 / Researcher
Organs
Distinct
Functions
Subordinate
Systems
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The most direct evidence of the wonderful plasticity and elasticity of red corpuscles is obtained when they are watched in a current, where they can be caught against a projecting edge and bent by the pressure of the current flowing past them.
August Krogh / Researcher
Bent
Caught
Elasticity
Evidence
Watched
Current
Edge
Flowing
Obtained
Projecting
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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 / Researcher
Excess
Atmospheric
Nearly
Positive Negative Way
Practically
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We may fondly imagine that we are impartial seekers after truth, but with a few exceptions, to which I know that I do not belong, we are influenced-and sometimes strongly-by our personal bias; and we give our best thoughts to those ideas which we have to defend.
August Krogh / Researcher
Science
Truth
Ideas
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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 / Researcher
Communication
Combination
Conclusion
Laboratory
Final
Numerous
Object
Observations
Vein
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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 / Researcher
Bicycle
Constant
Fishes
Insects
Metabolism
No Doubt
Rate
Respiration
Swimming
Technically
Obtain
Treadmill
Similar
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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.
August Krogh / Researcher
Found
Illumination
Intervals
Light
Mammals
Muscles
Pale
Strong
Superficial
Fairly
Quite
Both
Possible
Few
Frog
Least
Microscope
Observe
Reflected
Regular
Resting
Reveals
Using
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