The cat; an introduction to the study of backboned animals, especially mammals (1881) (20593203951)

Title: The cat; an introduction to the study of backboned animals, especially mammals

Identifier: catintroductiont00miva (find matches)

Year: 1881 (1880s)

Authors: Mivart, St. George Jackson, 1827-1900

Subjects: Cats; Anatomy, Comparative

Publisher: London, Murray

Contributing Library: MBLWHOI Library

Digitizing Sponsor: MBLWHOI Library

Text Appearing Before Image:

328 THE CAT. (chap. X, through which nourished and oxygenated blood is conveyed to the foetus, and its importance continues till birth. The estabhshment of pulmonary respiration, however, and the acquisition of the power of taking nourishment by suction, do away with all need for the placenta, and, by consequence, for its stalk, the umbilical cord, which is gnawed across by the mother on the Idtten's birth. The

Text Appearing After Image:

Fig. 150.—FCETUS IN UTERO (BUFFON AND DaUBENTON), SHOWINO THE FtETUS ENVELOPED IN ITS Amnion, and with its zonaky Placenta and spindle-shaped Umbilical Vesicle. a. Chorion. 7). Tlic z' planenta. (I. Umbilical vesicle. /, /. Its eluiiKatcil extremities. 'J. The vitelline duct. 7i. The sac, of the •amnion. k. The fcetiis. The short umbilical cord is showai passing from the aliddiiieii of the cnilnyo to the idacentii, and immediately ;,'iviii;( forth its vessels, forwards and backwards, into the placenta. part left in connexion with the abdominal wall soon shrivels up, dries, and falls off, but a permanent mark of its place of attachment persists throughout life as the umbilicus or navel. Such being the form and arrangement of the fecial membranes and adjuncts, the embryo or f(i:tus itself gradually and in a round- about way assumes the image of the kitten in the mode already intimated, and which will be more fully explained in describing the development of the several organs. The period of gestation is fifty-five or fifty-six days. The ovum having by that time attained its full intcr-uterine development, vigorous contractions of the muscular walls of the uterus ensue, while the os uteri dilates. The embryo is thus expelled from the

animal uteruses human foetuses in art placenta animals the cat an introduction to the study of backboned animals especially mammals 1881 umbilical cord in animals book illustrations anatomical atlas anatomy mammals animals images from internet archive

1881

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