The book The Nervous System And Its Conservation was written by author Percy Goldthwait Stiles Here you can read free online of The Nervous System And Its Conservation book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is The Nervous System And Its Conservation a good or bad book?
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Much blood is in the area, but it is making only slow progress through it. The con- dition is best accounted for on the theory that a marked THE AUTONOMIC NERVOUS SYSTEM 123 contraction has occurred in the microscopic veins, holding back the blood in the capillaries, which accordingly swell even though the arteries leading to them may be below their average size at the time. (It is the amount of blood in the capillaries which determines the color of the surface.) The capacity of the vasomotor s...ystem to make appro- priate responses to changes of external temperature is far from equal in different subjects. What we call "vital resistance" — ^the power to withstand exposure without ill effects — must depend largely upon the extent of this capacity. It. is probable that the variable feature is not so much in the execution of the primary reaction to weather changes, as in the reliability of the secondary adjustment, the promptness and vigor of the rebound to normal vaso- motor conditions after a disturbance.
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