Carpenter's principles of human physiology . pi- ] • thelium of a second ovum in the same follicle; g, fibrous persistent cell of a peculiar epithelial tunic; h, tunica propria folliculi; i, epithelium of the fnrTnatinn Wlipn matnrp a rvrimnr- foliicle (membrana granulosa). iormation. vv nen mature a prnnor- dial ovum has a diameter of 200^u (and* Principles of Biology, vol. ii. part vi. pp. For the literature of the Histology of the Ovaries up to 1871, see Art. Ovary and Par-ovarium, by W. Waldeyer, in Striekers Hum. and Comp. Histology, Syd. Soc. transl.,1872, vol. ii. p. 164. Sinc
Carpenter's principles of human physiology . pi- ] • thelium of a second ovum in the same follicle; g, fibrous persistent cell of a peculiar epithelial tunic; h, tunica propria folliculi; i, epithelium of the fnrTnatinn Wlipn matnrp a rvrimnr- foliicle (membrana granulosa). iormation. vv nen mature a prnnor- dial ovum has a diameter of 200^u (and* Principles of Biology, vol. ii. part vi. pp. For the literature of the Histology of the Ovaries up to 1871, see Art. Ovary and Par-ovarium, by W. Waldeyer, in Striekers Hum. and Comp. Histology, Syd. Soc. transl.,1872, vol. ii. p. 164. Since then there have appeared Kapff, Eeicherts Archiv, 1872, &513, Foulis, Trans. Koyal Soc, Edinburgh, vol. xxvii. and Sernoff, Centralblatt f. dieed. Wiss., 1874, p. 481, denying, and Komiti, Schultzes Archiv, Band x. p. 201, Born,Reicherts Archiv, 1874, p. 118, and to a certain extent Balfour, Quart. Journ. , vol. xviii. (1878), p. 383, and Klein, Atlas of Histology, p. 291, corroboratingWaldcyers histological OF THE OVUM AND ITS DEVELOPMENT. 875 since /i represents a micromillhnetre or 0-0000032809 of an inch, 200 /x wouldequal -00065618, or about l-524th of an inch;, and is contained within a capsuletermed the Graafian follicle or ovisac* In a large Graafian follicle we may dis-tinguish a connective tissue investing membrane, which is composed of two layers,the tunica Jibrosa(g, Fig. 311), and the tunica propria folliculi (h) ; the latter islined on its internal surface by several layers of cells, of which the nearest to thetunica propria are columnar, whilst the deeper ones are transparent and polyhe-dral (i), constituting the epithelium of the follicle, or membrana granulosa. Themembrana granulosa is collected round each ovum into a disk-like investmenttermed the discus proligerus (e, Fig. 311), and the remainder of the follicularcavity contains a clear fluid, the liquor folliculi. The earliest rudiment of everyovum consists of a simple cell with
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