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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“The Zonary Deciduate Placenta.—A zonary placenta surrounds the chorion, in the form of a broad zone, leaving the poles free. This form characterises all the land and sea carnivora, and thus includes the cat, hyena, puma, leopard, tiger, lion, fox and wolf; the dog and bear, the seal, sea-otter and walrus. It includes, also, certain extinct species, as the mastadon and dinotherium, which, although not wholly carnivorous, were, to judge from their teeth, partially so. The elephant, the only living species of these ancient animals, is also of this class.

“The Discoidal Deciduate Placenta.—The discoidal placenta is a highly developed vascular structure, lying on one side of the fœtus, in the form of a round disc, leaving the greater part of the chorion free. It is thus united only on one side, at one circular point, with the mucous membrane of the uterus, from which, as already mentioned, it is separated at parturition. The orders of the animals characterised by this form of placenta are the rodentia, ant-eaters, bats, and various species of apes, and man. All these are very closely united by homologous anatomical forms. The human placenta does not differ, in its general character, from that of the others, and there is no good reason for separating man from his placental classification.”