. The comparative anatomy of the domesticated animals. Horses; Veterinary anatomy. THE GENITAL ORGANIS OF THE FEMALE. 987 Fig. 531. accompanying it proliferates and forms two layers—membrana granulosa—around them. The surrounding connective tissue, pressed out, accommodates itself to the surface of the mass, and gradually constitutes a spherical shell—the fibrous envelope ; then the Graafian vesicle is formed. Soon the two layers of the membrana granulosa separate at one part to form a cavity—the cavity of the vesicle (Fig. 529, 5, G, 7) ; but as the separation is not complete, the ovum, encir
. The comparative anatomy of the domesticated animals. Horses; Veterinary anatomy. THE GENITAL ORGANIS OF THE FEMALE. 987 Fig. 531. accompanying it proliferates and forms two layers—membrana granulosa—around them. The surrounding connective tissue, pressed out, accommodates itself to the surface of the mass, and gradually constitutes a spherical shell—the fibrous envelope ; then the Graafian vesicle is formed. Soon the two layers of the membrana granulosa separate at one part to form a cavity—the cavity of the vesicle (Fig. 529, 5, G, 7) ; but as the separation is not complete, the ovum, encircled by the internal membrane, lies beside the external membrane. As the cavity of the vesicle enlarges, the tissue of the ovary becomes more condensed, uiid constitutes the fibrous wall, which soon receives a network of vessels. (This description does not altogether agree with what is taught by physiologists. It would appear that, in the course of development, groups of cylindrical cells grow up from the stroma of the ovary so as to enclose the primordial ova. These may even form tubular-like structures, called by some German writers the ova-tubes. By-and-by, each ovum is surrounded by cells, forming a little round body called the primary follicle, which consists of the ovum and of epithelial cells surrounding it. The forma- tion of this follicle around each ovum is for the purpose, in due time, of ejecting the ovum from the ovary. The size of the follicle increases by the multiplication of epithelium-cells, and soon a space exists round the ovum which is filled with a fluid—the liquor foUindi. This liquid may be formed by transudation from the surround- ing blood-vessels, and, as some have suggested, by the dis- integration and melting away of some of the epithelial cells. We have now a vesicle filled with fluid—the Graafian vesicle—having a diameter of from "5 to h mm. The connective tissue forms the wall of the vesicle. It consists of : 1. A connective ti
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Keywords: ., bookauthorcha, bookcentury1900, bookdecade1900, booksubjecthorses
