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Aristotle - On The Parts Of Animals
Atec Февраль 16 2008 20:01:06
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. And thus it
is that, in all such animals as we are now considering, there is found
what is called the jejunum; which is a part of the small gut, of the
gut, that is, which comes next to the stomach. For this jejunum lies
between the upper cavity which contains the yet unconcocted food and
the lower cavity which holds the residual matter, which by the time it
has got here has become worthless. There is a jejunum in all these
animals, but it is only plainly discernible in those of large size,
and this only when they have abstained from food for a certain time.
For then alone can one hit on the exact period when the food lies
half-way between the upper and lower cavities; a period which is
very short, for the time occupied in the transition of food is but
brief. In females this jejunum may occupy any part whatsoever of the
upper intestine, but in males it comes just before the caecum and
the lower stomach.
15
What is known as rennet is found in all animals that have a multiple
stomach, and in the hare among animals whose stomach is single. In the
former the rennet neither occupies the large paunch, nor the honeycomb
bag, nor the terminal reed, but is found in the cavity which separates
this terminal one from the two first, namely in the so-called
manyplies. It is the thick character of their milk which causes all
these animals to have rennet; whereas in animals with a single stomach
the milk is thin, and consequently no rennet is formed
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