Книга только для ознакомления
. For instance, the heart at first exists as a simple
pulsating vessel; the excreta are voided through a cloacal passage;
and the os coccyx projects like a true extending considerably beyond
the rudimentary legs."* In the embryos of all air-breathing
vertebrates, certain glands, called the corpora Wolffiana,
correspond with, and act like the kidneys of mature fishes.*(2) Even
at a later embryonic period, some striking resemblances between man
and the lower animals may be observed. Bischoff says "that the
convolutions of the brain in a human foetus at the end of the
seventh month reach about the same stage of development as in a baboon
when adult."*(3) The great toe, as Professor Owen remarks,*(4)
"which forms the fulcrum when standing or walking, is perhaps the most
characteristic peculiarity in the human structure"; but in an
embryo, about an inch in length, Prof. Wyman*(5) found "that the great
toe was shorter than the others; and, instead of being parallel to
them, projected at an angle from the side of the foot, thus
corresponding with the permanent condition of this part in the
Quadrumana." I will conclude with a quotation from Huxley,*(6) who,
after asking does man originate in a different way from a dog, bird,
frog or fish, says, "The reply is not doubtful for a moment; without
question, the mode of origin, and the early stages of the
development of man, are identical with those of the animals
immediately below him in the scale: without a doubt in these respects,
he is far nearer to apes than the apes are to the dog
|
