File:A text-book on physiology - for the use of schools and colleges - being an abridgment of the author's larger work on human physiology (1866) (14581608399).jpg

Identifier: textbookonphysio00drap (find matches)
Title: A text-book on physiology : for the use of schools and colleges : being an abridgment of the author's larger work on human physiology
Year: 1866 (1860s)
Authors: Draper, John William, 1811-1882
Subjects: Human physiology Physiology
Publisher: New York : Harper & Bros.
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School

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Text Appearing Before Image:
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: a.Graafian 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. 131.
Text Appearing After Image:
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 of different sizes;those near the pellucid zone are the largest. For themost part, the yolk consists of albumen and oil globules.Its cond

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