A system of obstetrics . ecede- the surface of theovary and increases in size,and also becomes more complexin structure. Ju<t below thecortical layer one finds in thenormal adult ovary follicles, theinvesting cells of which are cu-boidal ; at their enter ends is a OVULATION. 73 thin transparent layer, the membrana propria, which separates themfrom the stroma (Fig. 6). The stroma itself is somewhat condensed, andits fibres more closely interwoven immediately around the follicle, andthus forms a sort of capsule for it. As maturation of the follicle pro-ceeds, the investing cells become
A system of obstetrics . ecede- the surface of theovary and increases in size,and also becomes more complexin structure. Ju<t below thecortical layer one finds in thenormal adult ovary follicles, theinvesting cells of which are cu-boidal ; at their enter ends is a OVULATION. 73 thin transparent layer, the membrana propria, which separates themfrom the stroma (Fig. 6). The stroma itself is somewhat condensed, andits fibres more closely interwoven immediately around the follicle, andthus forms a sort of capsule for it. As maturation of the follicle pro-ceeds, the investing cells become columnar, and then they multiply andbecome two layers thick, so that the ovum becomes invested by twolayers of cells, by a membrana propria, and by a fibrous capsule. Theinner layer of the investing cells is probably formed by division ofthe cells of the primary single stratum. In riper and more deeply-placed follicles the cells of both investinglayers are found to have multiplied, and a considerable quantity of Fig. A Graafian Follicle a little more mature than shown in Fig. 4 (diagrammatic) : a, investingcells ; 6, membrana propria; c, commencing capsule of follicle ; d, ovarian stroma; c, vitel-lus; /, germinal vesicle. albuminous liquid (liquor folliculi) to have collected between them (, Lf), except at one region : there the cells cohere, and the ovum isalways situated at this place. It thus comes to be excentric in positionwithin the Graafian follicle, the side which it lies next being usually thatnearest the surface of the ovary. The cells (J/<7, Fig. 5) which line thefollicle constitute the membrana granulosa; those which immediatelyinvest the ovum form the discus proligerus (i), Fig. 5). The follicular liquid contains a form of proteid named paralbumin,which differs from ordinary proteids in that it is not coagulated andrendered insoluble in water when precipitated by alcohol. Paralbnmenhas been found in ovarian cysts. 1 PHYSIOLOGY AND HISTOLOGY OF OVULATI
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectobstetrics, bookyear1
