. The science and art of midwifery . Uterus post partnm, Arch. f. Gynaek., Bd. ix, p. 22,1876. Friedlanderservations have been confirmed by Kundrat and Engelmann, Langhans, andId. + Professor Turner, The Structure of the Placenta, -lour, of Anat and PhysioLvol. x. p. 136. 56 PHYSIOLOGY OF THE OVUM. rial, and is without doubt absorbed by the villi for the benefit of thefoetus.* In the cat, the villi of the chorion have the form of broad, sinuousleaflets, which, about the completion of one half the period of gesta-tion, are so interlocked with the crypts that the two surfaces can notbe disengage
. The science and art of midwifery . Uterus post partnm, Arch. f. Gynaek., Bd. ix, p. 22,1876. Friedlanderservations have been confirmed by Kundrat and Engelmann, Langhans, andId. + Professor Turner, The Structure of the Placenta, -lour, of Anat and PhysioLvol. x. p. 136. 56 PHYSIOLOGY OF THE OVUM. rial, and is without doubt absorbed by the villi for the benefit of thefoetus.* In the cat, the villi of the chorion have the form of broad, sinuousleaflets, which, about the completion of one half the period of gesta-tion, are so interlocked with the crypts that the two surfaces can notbe disengaged from one another. Vertical sections show that the wallsof the crypts closely follow the sinuosities of the villi in such wise asto form an intimate investment for them. Injections of the maternalcapillaries show them to be dilated to two or three times the size ofthe capillaries in the fetal In the human placenta the relations of the villi to the uterine mu-cous membrane differ somewhat at different stages of FlG, 18. Diagram showing the branching: of the villi and the connection of the larger trunkswith the placenta, a, chorion : 6, primary trunk, with radiate branches to: <l. the tertiarybranches, which either directly, or after previous division (d), penetrate the placenta ma- tenia (/). The free terminal tufts (e) are indicated only at a few points. (Langhans. I Thus, at first, the empty cylindrical villi simply sink into the soft,pulpy, interglandular spaces. Next, as the villi sprout And become vas-cular and arborescent, projections formed from the proliferation ofthe superficial portion of the serotina grow around the offshoots andbranching processes. At this time we distinguish in the placenta afetal portion, the placenta fcetalis, composed of the villous tufts of the * The uterine milk can not be obtained from the placenta of the marc unmixedwith the secretions from the uterine glands. The analyses of Professors Prevost,Schlossberger, and Gam
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