Identifier: americantextbook00norr (find matches)
Title: An American text-book of obstetrics. For practitioners and students
Year: 1897 (1890s)
Authors: Norris, Richard C. (Richard Cooper), 1863-1937 Dickinson, Robert Latou, 1861-
Subjects: Obstetrics Obstetrics
Publisher: Philadelphia, W. B. Saunders
Contributing Library: Yale University, Cushing/Whitney Medical Library
Digitizing Sponsor: Open Knowledge Commons and Yale University, Cushing/Whitney Medical Library

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Fig. 78.—Placenta viewed from uterine surface of attachment, showing divisions into cotyledons (Bidloo). maternal tissues, the circulation of the villi coming into close approximation DEVELOPMENT OF THE FETUS AND ITS APPENDAGES. Plate 14.
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•r C3 =3 fc- PHYSIOLOGY OF PREGNANCY. 89 with the enlarged blood-vessels of the mother. These simple relationsbecome complicated in the higher mammals and in man by the complexcharacter of the chorionic villi, whose irregular form and disposition arefurther masked by actual attachments formed between the tips of many largevilli and the maternal tissue (PL 14). The disappearance of the epithelial portions of the uterine mucosa bringsthe fetal villi into close relation with the proliferated connective tissue of themucosa, with a diminution in the structures separating the fetal and the

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