. Hand-book of physiology . • Fig. 69.—A. An ovarian o^^^m from a bitch in heat, exhibiting theelongated form and stellate arrangement of the cells of the discus proli-gerus or membrana granulosa around the zona pellucida. b. The sameovum after the removal of most of the club-shaped cells. TO THE FORMATION OF THE EMBRYO. 653 the ovary. They become club-shaped, their pointed extre-mities being attached to the zona pellucida, so as to give theovum a stellate appearance (see fig. 69). When the ovumenters the Fallopian tube, these cells lose their spindle or club-like shajDe, and become quite roun
. Hand-book of physiology . • Fig. 69.—A. An ovarian o^^^m from a bitch in heat, exhibiting theelongated form and stellate arrangement of the cells of the discus proli-gerus or membrana granulosa around the zona pellucida. b. The sameovum after the removal of most of the club-shaped cells. TO THE FORMATION OF THE EMBRYO. 653 the ovary. They become club-shaped, their pointed extre-mities being attached to the zona pellucida, so as to give theovum a stellate appearance (see fig. 69). When the ovumenters the Fallopian tube, these cells lose their spindle or club-like shajDe, and become quite round. In the bitch, they con-tinue to invest the ovum in this round shape throughout thewhole tract of the Fallo23ian tube, disappearing only when theovum reaches the uterus; but, in the rabbit, they wholly dis-appear at its very commencement. Besides the disappearance of the germinal vesicle, and, inthe rabbit, the disappearance also of the cells of the membranagranulosa, the yelk, in the upper part of the Fallopian tube,
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectphysiology, bookyear1
