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they crouch sitting to void it, and if the testes are drawn up they appear from a
distance to have both male and female generative organs. The passage of the
solid food also has been closed before now in sheep and some other animals;
there was a cow in Perinthus which passed fine matter, as if it were sifted,
through the bladder, and when the anus was cut open it quickly closed up
again nor could they succeed in keeping it open.
We have now spoken of the production of few and many young, and of the
outgrowth of superfluous parts or of their deficiency, and also of
monstrosities.
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5
Superfoetation does not occur at all in some animals but does in others; of
the former some are able to bring the later formed embryo to birth, while
others can only do so sometimes. The reason why it does not occur in some is
that they produce only one young one, for it is not found in solid-hoofed
animals and those larger than these, as owing to their size the secretion of the
female is all used up for the one embryo. For all these have large bodies, and
when an animal is large its foetus is large in proportion, e.g. the foetus of the
elephant is as big as a calf. But superfoetation occurs in those which produce
many young because the production of more than one at a birth is itself a sort
of superfoetation, one being added to another. Of these all that are large, as
man, bring to birth the later embryo, if the second impregnation takes place
soon after the first, for such an event has been observed before now. The
reason is that given above, for even in a single act of intercourse the semen
discharged is more than enough for one embryo, and this being divided causes
more than one child to be born, the one of which is later than the other. But
when the embryo has already grown to some size and it so happens that
copulation occurs again, superfoetation sometimes takes place, but rarely,
since the uterus generally closes in women during the period of gestation. If
this ever happens (for this also has occurred) the mother cannot bring the
second embryo to perfection, but it is cast out in a state like what are called
abortions. For just as, in those animals that bear only one, all the secretion of
the female is converted to the first formed embryo because of its size, so it is
here also; the only difference is that in the former case this happens at once, in
the latter when the foetus has attained to some size, for then they are in the
same state as those that bear only one. In like manner, since man naturally
would produce many young, and since the size of the uterus and the quantity
1487
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Buch The Complete Aristotle"
The Complete Aristotle
- Titel
- The Complete Aristotle
- Autor
- Aristotle
- Datum
- ~322 B.C.
- Sprache
- englisch
- Lizenz
- PD
- Abmessungen
- 21.0 x 29.7 cm
- Seiten
- 2328
- Schlagwörter
- Philosophy, Antique, Philosophie, Antike, Dialogues, Metaphysik, Metaphysics, Ideologie, Ideology, Englisch
- Kategorien
- Geisteswissenschaften
- International
Inhaltsverzeichnis
- Part 1; Logic (Organon) 3
- Categories 4
- On Interpretation 34
- Prior Analytics, Book I 56
- Prior Analytics, Book II 113
- Posterior Analytics, Book I 149
- Posterior Analytics, Book II 193
- Topics, Book I 218
- Topics, Book II 221
- Topics, Book III 237
- Topics, Book IV 248
- Topics, Book V 266
- Topics, Book VI 291
- Topics, Book VII 317
- Topics, Book VIII 326
- On Sophistical Refutations 348
- Part 2; Universal Physics 396
- Physics, Book I 397
- Physics, Book II 415
- Physics, Book III 432
- Physics, Book IV 449
- Physics, Book V 481
- Physics, Book VI 496
- Physics, Book VII 519
- Physics, Book VIII 533
- On the Heavens, Book I 570
- On the Heavens, Book II 599
- On the Heavens, Book III 624
- On the Heavens, Book IV 640
- On Generation and Corruption, Book I 651
- On Generation and Corruption, Book II 685
- Meteorology, Book I 707
- Meteorology, Book II 733
- Meteorology, Book III 760
- Meteorology, Book IV 773
- Part 3; Human Physics 795
- On the Soul, Book I 796
- On the Soul, Book II 815
- On the Soul, Book III 840
- On Sense and the Sensible 861
- On Memory and Reminiscence 889
- On Sleep and Sleeplessness 899
- On Dreams 909
- On Prophesying by Dreams 918
- On Longevity and the Shortness of Life 923
- On Youth, Old Age, Life and Death, and Respiration 929
- Part 4; Animal Physics 952
- The History of Animals, Book I 953
- The History of Animals, Book II translated 977
- The History of Animals, Book III 1000
- The History of Animals, Book IV 1029
- The History of Animals, Book V 1056
- The History of Animals, Book VI 1094
- The History of Animals, Book VII 1135
- The History of Animals, Book VIII 1150
- The History of Animals, Book IX 1186
- On the Parts of Animals, Book I 1234
- On the Parts of Animals, Book II 1249
- On the Parts of Animals, Book III 1281
- On the Parts of Animals, Book IV 1311
- On the Motion of Animals 1351
- On the Gait of Animals 1363
- On the Generation of Animals, Book I 1381
- On the Generation of Animals, Book II 1412
- On the Generation of Animals, Book III 1444
- On the Generation of Animals, Book IV 1469
- On the Generation of Animals, Book V 1496
- Part 5; Metaphysics 1516
- Part 6; Ethics and Politics 1748
- Nicomachean Ethics, Book I 1749
- Nicomachean Ethics, Book II 1766
- Nicomachean Ethics, Book III 1779
- Nicomachean Ethics, Book IV 1799
- Nicomachean Ethics, Book V 1817
- Nicomachean Ethics, Book VI 1836
- Nicomachean Ethics, Book VII 1851
- Nicomachean Ethics, Book VIII 1872
- Nicomachean Ethics, Book IX 1890
- Nicomachean Ethics, Book X 1907
- Politics, Book I 1925
- Politics, Book II 1943
- Politics, Book III 1970
- Politics, Book IV 1997
- Politics, Book V 2023
- Politics, Book VI 2053
- Politics, Book VII 2065
- Politics, Book VIII 2091
- The Athenian Constitution 2102
- Part 7; Aesthetic Writings 2156