Читать книгу The Natural Food of Man. Being an attempt to prove from comparative anatomy, physiology, chemistry and hygiene, that the original, best and natural diet of man is fruit and nuts онлайн

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1. The non-deciduate placenta of the Herbivora.

2. The deciduate placenta, of which there are two kinds:

(a) The zonary deciduate placenta of the Carnivora.

(b) The discoidal deciduate placenta of the Frugivora.

“The deciduate placenta is a distinct structure, developed from the wall of the uterus, but separated from it at parturition, and constituting what is known as the ‘after birth’; of this the human placenta is regarded by Huxley as the most perfect example; while, of the non-deciduate placenta, that of the pig and horse are the typical representatives. The word ‘decidua’ signifies ‘that which is thrown off.’

“The Non-Deciduate Placenta.—This form is thus described by Professor Huxley: ‘No decidua is developed. The elevations and depressions of the unimpregnated uterus simply acquire a greater size and vascularity during pregnancy, and cohere closely to the chorionic villi, which do not become restricted to one spot, but are developed from all parts of the chorion, except at its poles, and remain persistent in the broad zone thus formed throughout fœtal life. The cohesion of the fœtal and maternal placentæ, however, is overcome by slight maceration; and at parturition the fœtal villi are simply drawn out, like fingers from a glove, no vascular substance of the mother being thrown off.’ To this class belong all the ruminants and Ungulata (hoofed quadrupeds); the camel, sheep, goat and deer; the ant-eater, armadillo, sloth, swine, tapir, rhinoceros, river-horse, sea-cow, whale, and others.