THE FEMALE GENITAL TEACT. 



841 



near each other, the adventitial layer, common to all, consists mainly of 

 fibrous structure, between which relatively small bridges of myxomatous 

 tissue are left. 



Let us now examine the formations in the solid part of the placenta with 

 the magnifying power of 1200 diameters, beginning with a six-months' 

 placenta. (See Fig. 378.) 



The stroma is built up by bioplasson, arranged in the shape of multinuclear 

 bodies, and by the basis-substance. The latter, looking homogeneous or 

 finely granular with a low power, proves to be formed by extremely small 

 spindles closely packed together, if seen with a high power. These spindles 

 are united with each other by delicate threads running vertically through 

 all the trabeculas of the basis-substance. In the meshes of the reticular 

 basis-substance, again, we find round or oblong plastids. 



FIG. 378. HUMAN PLACENTA OF Six MONTHS. 



M, multinuclear bioplasson cluster ; C, delicate fibrous connective tissue ; D, plastids in 

 transition to a myxomatous basis-substance. Magnified 1200 diameters. 



Wherever we meet with bioplasson, its structure, as first described by C. 

 Heitzmann, is plainly visible. Coarse granules present in the middle of 

 nuclei, the so-called nucleoli, send out radiated spokes, through which they 

 are united with the neighboring smaller granules. Again, these granules are 

 united with each other and with the shell of the nucleus by means of delicate 

 threads. The shell of the nucleus, being either a smooth or granular layer, 

 although continuous under all circumstances, projects very minute radiated 

 offshoots, which traverse the light seam around the nucleus, and run to the 

 next granules of the bioplasson body. All granules of the latter are united 

 more or less distinctly by fine threads, so much so that a delicate net-work 

 is established throughout the corpuscles. Where bioplasson meets with 



