Manual of human histology . of extension withoutbeing torn; and in chemical characterscorresponds, in every particular, with the membranae propria,§ 16. The light-yellow yelk, which in recent ovula completelyfills the vitelline membrane, is composed of a viscid fluid, havingnumerous minute, pale granules dispersed in it, with which, inthe mature ova, some fatty granules are also associated, and,in the fully-formed ovum, contains, excentrically, a well-markedvesicular nucleus, 002, with clear contents, and a homo-geneous, round, parietal nucleolus, 0-003^ in size, the germinalvesicle, vesicula
Manual of human histology . of extension withoutbeing torn; and in chemical characterscorresponds, in every particular, with the membranae propria,§ 16. The light-yellow yelk, which in recent ovula completelyfills the vitelline membrane, is composed of a viscid fluid, havingnumerous minute, pale granules dispersed in it, with which, inthe mature ova, some fatty granules are also associated, and,in the fully-formed ovum, contains, excentrically, a well-markedvesicular nucleus, 002, with clear contents, and a homo-geneous, round, parietal nucleolus, 0-003^ in size, the germinalvesicle, vesicula germinativa (the vesicle of Purkinje), andthe germinal spot, macula germinativa (or spot of Wagner)as they are here termed. The parovarium (Nebeneierstock), a rudiment of the Wolffian Fig. 265. Human ovulum, from a follicle of the average size, x 250 diam.: a,vitelline membrane {zona pellucida),- i, external boundary of the yelk, and also in-ternal boundary of the yelk-membrane; e, germinal vesicle, with the germinal 250 SPECIAL HISTOLOGY. body of the embryo, consists of a certain number of canals,0*15—Q2 in diameter, diverging from the Mlus ovarii intothe bats wing, which in Man neither open into the ovariumnor are connected with any other parts, and contain nothingbut a little clear fluid. The tubes are formed of a fibrousmembrane, 0-020—0024 thick, and of a single layer of pale,cylindrical, probably ciliated cells, and are of interest only asthe remains of an embryonic structure. The arteries of the ovary, derived from the aa. spermaticaand uterina, and forming numerous minute trunks betweenthe lamella of the broad ligaments, enter from the inferiorborder of the ovary, run in a serpentine course in the internalportion of the stroma, and terminate partly in the stromaitself and in the t. albuginea, but chiefly in the walls ofthe Graafian follicles, where they form an exterior morecoarse, and an inner finer plexus, which extends as far as themembrana granulosa. The
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Keywords: ., bookcentury1800, bookdecade1850, booksubjecthistolo, bookyear1853
