A treatise on the science and practice of midwifery / By W. S. Playfair.
- William Smoult Playfair
- Date:
- 1885
Licence: Public Domain Mark
Credit: A treatise on the science and practice of midwifery / By W. S. Playfair. Source: Wellcome Collection.
Provider: This material has been provided by the Augustus C. Long Health Sciences Library at Columbia University and Columbia University Libraries/Information Services, through the Medical Heritage Library. The original may be consulted at the the Augustus C. Long Health Sciences Library at Columbia University and Columbia University.
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![sure on the others, destroy them. Of those that grow, of course only a few ever reach maturity; they are scattered through the substance of the ovary, some developing- in the_ stroma, others on the surface of the orggn^wWp tlipy eventually burst, and are discharged into the_Falk>- j)ian_tube. Stmdurrjil^^ Follicle.—A ripe Graafian follicle has an ^external investing membrane7Fiir38), which is generally described as Fig. 38. 1. Ovum. Diagrammatic Section of Graafian Follicle. 2. lilenibrana granulosa. 3. External membrane of Graafian follicle. 4. Its vessels. rian stroma. 6. Cavity of Graafian follicle. 7. External covering of ovary. consisting of two distinct layers—the external, or tunjca-fibrosa, highly vascular, and formed of connective tissue; the internal, or tunica__fiw- pria, composed of young connective tissue, containing a large number of fusiform or stellate cells and numerous oil-globules. These layers, hoAvever. ap]3ear to be essentially formed of condensed ovarian stroma. -^•Within this capsule is the epitheliaHining called the menibrana aranu- hsa^ consisting of stratified columnar epithelial cells, which, according foFoiilis, are originally formed from the nuclei of the fibro-nuclear tis- sue of the stroma of the ovary. At one part of the circumference of the ovisac is situated the ovule, around which the epithelial cells are con- gregated_in greater quantity, cojistituting the projection known as the dii£Hs proUqerm. ^S'The remainder of the cavity of tlie-fiiUiclais filled witli a small (|uantity of transparent fluid, the liquo?' folliculi. traversed by three or four minute bands, the retinacula^bf i^arry, which are attached to the opposite walls of the follicular cavity, and apparently serve the purpose of su.spending the ovule and maintaining it in a proper position. In many young follicles this cavity does not at first exist, the follicle being entirely filled by the ovule. According to Waldeyer, the lifjuor fiilliculi is formed by the disintegration of the epithelial cells, the fluid thus produced collecting, and distending the interior of the follicle. The Ovvfe.—The onile is attached to some part of the internal sur- face of the (iraafian follicle. It is a rounded vesicle about x-g-pth of an infli in diameter, and is surrounde<l l)y a layer of (^olumnai' cells, dis- tinct from tho.so of the discus ])roligerus, in which it li(!S. Jt is invested by a transparent elastic membrane, the zona pellucida, or vitelline mem -](https://iiif.wellcomecollection.org/image/b2121072x_0085.jp2/full/800%2C/0/default.jpg)
