. A text-book on physiology : for the use of schools and colleges : being an abridgment of the author's larger work on human physiology. ayer of nucle-ated cells, designated membrana granulosa. It is filledwith a fluid in which multitudes of granules float, andin its centre is the ovule. This, as it becomes mature,is pushed up toward the surface of the ovisac by an ac-cumulation of liquid in the lower part thereof, and is sobrought into close relation with the membrana granu-losa at the place where it is upon the surface of the ova-ry. At this point there collects on the ovum a zone of What is
. A text-book on physiology : for the use of schools and colleges : being an abridgment of the author's larger work on human physiology. ayer of nucle-ated cells, designated membrana granulosa. It is filledwith a fluid in which multitudes of granules float, andin its centre is the ovule. This, as it becomes mature,is pushed up toward the surface of the ovisac by an ac-cumulation of liquid in the lower part thereof, and is sobrought into close relation with the membrana granu-losa at the place where it is upon the surface of the ova-ry. At this point there collects on the ovum a zone of What is the catamenial discharge ? How long does it continue ?What does it indicate ? Describe the production of ova. 340 OVUM. granules, to which the designation of discus proligerusis given. Fig. 129, transverse section through the ovary: follicle of inferior, and, 5, of superior surface;c, peritoneal lamella of ligamentum latum, continuedupon the ovary, and coalescing with, d, the tunica albu-ginea: in the interior two corpora albicantia (old cor-pora lutea) are visible; e, stroma of the ovary. Fig. 129. Fig. 130. Fig. Section of Graafian vesicle- Ovum. Section of ovary. Fig. 130, section of the Graafian vesicle: 1, stromaof ovary, with blood-vessels; 2, peritoneum; 3 and 5,layers of the external coat of the Graafian vesicle; 4,membrana granulosa ; 6, fluid of the vesicle; 7, granularzone, or discus proligerus; 8, the ovum. Fig. 131, ovum: 1, germinal spot; 2, germinal vesi-cle ; 3 yolk; 4, zona pellucida; 5, discus proligerus; 6,adherent granules or cells. The diameter of the human ovum varies from the -j^o-to the -^Jtj- of an inch. It consists .of an exterior trans-parent membrane, the 2^0b of an inch in thickness,which, when compressed for the purpose of examina-tion, appears like a diaphanous circle, and hence calledzona pellucida. Within this zone, and inclosed by it,is the yolk, a granular material suspended in or inter-mingled with fluid, the granules being
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Keywords: ., bookautho, bookcentury1800, bookdecade1860, booksubjectphysiology
