Elementary Physiology : for Teachers And Others
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In our eReader you can find the full English version of the book. Read Elementary Physiology : for Teachers And Others Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Elementary Physiology : for Teachers And Others
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In dependent parts of the body the veins become distended and the blood tends to stagnate. In maintaining an active circulation, therefore, not only in the muscles, but throughout the body, exercise is of great importance. We cannot expect to remain healthy unless we take a sufficient amount of exercise.
The Circulation in Childhood.— The chief peculiarity of the circulation in childhood is the comparative rapidity of the heart's action. Thus the pulse-rate in infancy is normally over loo; betw...een two and six years it is from 90 to 105 ; from seven to ten years it is from 80 to 90. These are the rates during absolute quiet. The least exertion or excitement increases the rapidity still further.
The heart is relatively slightly larger than in the adult and the blood-vessels are more elastic. Consequently the heart can easily cope with the increased work which the active habits of children involve. Increased strain is thrown upon the heart by severe exertion, as in lifting heavy weights ; by sudden exertion, as in the tackling in football ; and by prolonged exertion, as in long distance running.
What to read after Elementary Physiology : for Teachers And Others?
You can find similar books in the "Read Also" column, or choose other free books by Drummond, W. B. (William Blackley) to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
In dependent parts of the body the veins become distended and the blood tends to stagnate. In maintaining an active circulation, therefore, not only in the muscles, but throughout the body, exercise is of great importance. We cannot expect to remain healthy unless we take a sufficient amount of exercise.
The Circulation in Childhood.— The chief peculiarity of the circulation in childhood is the comparative rapidity of the heart's action. Thus the pulse-rate in infancy is normally over loo; betw...een two and six years it is from 90 to 105 ; from seven to ten years it is from 80 to 90. These are the rates during absolute quiet. The least exertion or excitement increases the rapidity still further.
The heart is relatively slightly larger than in the adult and the blood-vessels are more elastic. Consequently the heart can easily cope with the increased work which the active habits of children involve. Increased strain is thrown upon the heart by severe exertion, as in lifting heavy weights ; by sudden exertion, as in the tackling in football ; and by prolonged exertion, as in long distance running.
What to read after Elementary Physiology : for Teachers And Others?
You can find similar books in the "Read Also" column, or choose other free books by Drummond, W. B. (William Blackley) to read onlineMoreLess
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