United States or Ethiopia ? Vote for the TOP Country of the Week !
Smith and Schuster found that castration at other seasons caused the pad to remain in the condition in which it was at the time, that there was no reduction or absorption as Nussbaum and Meisenheimer found, and that allo-transplantation of testes that is, the introduction of testes from other frogs either into the dorsal lymph-sacs or into the abdominal cavity or the injection of testis extract, had no effect in causing growth or development of the thumb-pad.
Smith and Schuster found that ovariotomy, with or without subsequent implantation of testes or injection of testis extract, had no effect in causing the thumb of the female to assume any male characters.
But castration shows that the antlers of stags and other such characters are not determined in the zygote when the sex is determined, but owe their development, partly at least, to the influence of another part of the body, namely, the testes during the subsequent life of the individual.
Besides the ante-pituitary, in the evolution of judgment, and the judgment faculty, due stress must be laid upon the influence of the internal secretion of the testes or ovaries, the product of the interstitial cells. With the advent of the gonads upon the scene, judgments become the centre of the play's plot undoubtedly. The intelligence of eunuchs and eunuchoids is in general low.
In the case of the Free-Martin cattle, even the female sex-glands are modified toward the male type to such an extent that they were long mistaken for testes. The same applies to some glands found in human "hermaphrodites," as Dr Bell's plates show. On the other hand, the fact that such complete transformations have not so far been observed by no means proves their non-existence.
While there are many features of this mysterious influence of the testes which have never yet been cleared up, this seems certain, that the testes elaborate what may be called an internal secretion, and that the elaboration of this internal secretion is influenced by such stimulation as has just been described above, under the head of sub-conscious sexual stimulation.
Her life was so miserable that all who came in contact with her were made miserable, also. She was unsexed, and one of the "sparks of life" had been taken away. She assumed characteristics of the male. If the testes of a man are removed he will assume the characteristics of a woman. Many changes will take place.
At the age of two years these two young horses may be as alike as two peas in a pod. One of these promising young animals is chosen, because of some commendable peculiarity of temperament or action, to remain unmutilated, as a procreator of his kind upon the ranch. The other is subjected to the veterinarian's knife and ecraseur and deprived of the testes, the male sexual glands.
In the former the testes are situated in a well-defined scrotum, in the latter these organs are abdominal. The Phocidae are probably descended from Mammals of the terrestrial type with a scrotum, which has disappeared in the course of evolution. Perhaps the most curious exception is that of the elephants, in which the testes are abdominal.
Ideas, or motions of the nerves of vision or of touch, are imitated by the ultimate extremities of the glands of the testes, which mark the sex. This effect of the imagination belongs only to the male. The sex of the embryon is not owing to accident. 4. Causes of the changes in animals from imagination as in monsters. From the male. From the female. 5. Miscarriages from fear. 6.
Word Of The Day