. The cat : an introduction to the study of backboned animals, especially mammals. Cats; Anatomy, Comparative. Fig. Section through the Axis of the Ovum, in which the Epiblastic Cells (e) have almost surrounded the Hypoblastic ones (i). d. Central cell. o. Hypoblastic cell, occupying the interspace left at one point by the epiblastic Fig. 143. A. Commencing separation between the epi- blastic and hypoblastic cells. e. Epiblast. t. Hypoblast. k. Cavity formed by the separation. B. Completion of the process, and formation of a germ area, or gastro-disc, of two layers—
. The cat : an introduction to the study of backboned animals, especially mammals. Cats; Anatomy, Comparative. Fig. Section through the Axis of the Ovum, in which the Epiblastic Cells (e) have almost surrounded the Hypoblastic ones (i). d. Central cell. o. Hypoblastic cell, occupying the interspace left at one point by the epiblastic Fig. 143. A. Commencing separation between the epi- blastic and hypoblastic cells. e. Epiblast. t. Hypoblast. k. Cavity formed by the separation. B. Completion of the process, and formation of a germ area, or gastro-disc, of two layers— one (e) of epiblastic cells, the other (i) of hypoblastic cells. of the embryo. The first indication of the embryo is the appear- ance of a longitudinal depression or furrow, termed the medullary groove (Fig. 145), and it is the sign of the appearance of the most important and central of all the organs of the future animal, for in * In a paper read before the Royal Society on March 23, 1876, Mr. E. A. Schafer describes the formation of a membrane in the cat's ovum between the epiblast and hypoblast. This mem- branous follicle he named membrana limitans hypoblastica. The fact of its presence favours the view according to which the mesoblast is derived from the epiblast. See Pro. Roy. Soc, vol xxiv., plate Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Mivart, St. George Jackson, 1827-1900. New York : Scribner's
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectanatomy, bookyear1881
