Atlas of Memoir upon the utricular glands of the uterus and the glandular organ of new formation which is developed during pregnancy, consisting of ten plates : also of Monograph upon the unity of the anatomical type of the placenta, consisting of five plates / by G.B. Ercolani ; engraved by Bettini, and reproduced by the heliotype process.

Ercolani, Giovanni Battista, 1854-1912.

Date:: 1881

Credit: Atlas of Memoir upon the utricular glands of the uterus and the glandular organ of new formation which is developed during pregnancy, consisting of ten plates : also of Monograph upon the unity of the anatomical type of the placenta, consisting of five plates / by G.B. Ercolani ; engraved by Bettini, and reproduced by the heliotype process. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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function alone being different, absorbent in the foetal portion (No. 7), secretory in the maternal portion (No. 2). (a) Walls of the gravid uterus. (ft) Uterine surface of the placenta. (c) Uterine vessels. {d) Yascular loop of the maternal villus representing the placental vessels. (e) Secretory epithelium which covers the loop representing the placental cells. (y) Chorion. (g) Foetal vessels in the chorion. (Ji) Yascular loop of the foetal villus representing the villi of the chorion. The absorbent foetal villus is still covered with a proper epithelium. NUMBERS 3, 4. Diagram representing the foetal and maternal portions of the simplest forms of diffused placenta, observed in the cetacea and in the sow. The letters indicate the same parts as in the preceding scheme. The fundamental typical form is very clearly preserved in both parts of the placenta. The repetition in loco and the crowding together of many maternal villi occasion the formation of small crypts into which enter the foetal villi. NUMBERS 5, 6. Diagram representing the foetal and maternal portions of the placenta of the solipeds. The letters indicate the same parts as in the foregoing. The maternal crypts are more perfect than in the preceding scheme, and appear in the form of simple glandular follicles, into which enter the foetal villi. NUMBERS 7, 8. Diagram representing the foetal and maternal portions of the multiple placenta of a ruminant. The letters indicate the same parts as before. The glandular follicles resulting from the union and aggregation of many maternal villi give the maternal portion of the placenta the appearance of a compound gland; the typical form of the primitive villus, foetal as well as maternal, is not lost, but remains as in the pre- ceding diagram by this complication of form, which is more apparent than real.

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