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On Disorders Of Assimilation, Digestion, Etc. (1901) (Paperback)
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On Disorders Of Assimilation, Digestion, Etc. (1901) (Paperback)
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for free. This is an OCR edition with typos. Excerpt from book:
SECTION II. (British Medical Journal, January 10, 1874.) The second
great function of the liver is to give out, during fasting, the
nutriment which it has stored up during digestion. This is effected
by the glycogen, which has been stored up in the organ, becoming
gradually transformed into sugar again. It is then washed out of
the liver by the blood and carried with it into the general
circulation. The conversion of glycogen into sugar is effected by
means of a diastatic ferment, of which a minute quantity only is
present in the liver itself, but which is contained to a much
larger amount in the blood. When the flow of blood through the
liver is slow, the transformation of glycogen goes on gradually,
but it is quickened whenever the current becomes more rapid. It
seems probable that, although the blood of the portal vein may have
something to do with the transformation of glycogen into sugar,
this process is more closely connected with the circulation through
the hepatic artery; for those lesions of the nervous system which
increase the flow of blood through the liver and induce diabetes,
have, according to Cyon,1 little influence over the calibre of the
vein, but cause the artery to dilate widely. As the blood from the
artery flows into the portal vein, any increase in the circulation
within it also quickens that in the vein to some extent. The
circulation in the liver may be increased either by raising the
pressure of blood in the arteries generally, so that the blood
flows more quickly through the hepatic artery, although its size
may remain the same as before, or by causing it to dilate, so that
it receives a greater share of blood, while the pressure in the
arteries generally remains the same. 1 Cyon and Aladoff. Reprint
from the Melanges Biologiquts (which Professo...
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