A textbook of obstetrics . Fig. 70.—e, Embryo ; ec, cephalicextremity; eg, caudal extremity; catca, amniotic hood ; //, pp, pleuroperi-toneal cavity; j, umbilical Fig. 71.—r. Embryo; a, amnion; oa, amniotic umbilicus; cac, amnio-chorional cavity ; pp, pp, pleuroperito-neal cavity; ch, chorion; mv, vitel-line membrane; vo, umbilical vesicle. reinforcement from the middle layer of cells, or the now the embryo begins to assume a definite shape, and thelateral walls begin to fold in toward one another, and the caudalextremity approaches a little to the cephalic end of the emb
A textbook of obstetrics . Fig. 70.—e, Embryo ; ec, cephalicextremity; eg, caudal extremity; catca, amniotic hood ; //, pp, pleuroperi-toneal cavity; j, umbilical Fig. 71.—r. Embryo; a, amnion; oa, amniotic umbilicus; cac, amnio-chorional cavity ; pp, pp, pleuroperito-neal cavity; ch, chorion; mv, vitel-line membrane; vo, umbilical vesicle. reinforcement from the middle layer of cells, or the now the embryo begins to assume a definite shape, and thelateral walls begin to fold in toward one another, and the caudalextremity approaches a little to the cephalic end of the embryo,giving it the arched back characteristic of the young embryo,the outer layer of cells, forming a membrane continuous withthe outer covering of the embryo, instead of being simply rar-ried forward to meet in the median line in front, sends reduplica-tions backward over the dorsal aspect of the embryo, whichshortly meet and join one another. There are consequently twocavities formed,—one within the membrane doubled back uponitseli ; the other between the inner (the true amnion) of the twolayers of membrane and the outer covering of the embryo. The THE AMNION,
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Keywords: ., bookcentury1800, bookdecade1890, bookidtex, booksubjectobstetrics
