. The cat; an introduction to the study of backboned animals, especially mammals. Cats; Anatomy, Comparative. 320 THE CAT. [chap. X. membranes coexist is the germ area, or gastrodisc. In the central portion of this, a third membrane soon makes its appearance (Fig. 144), This is the mcsohlad, and is thought to be derived from the h}7)oblast,''" by sub- divisions of the cells of the letter. The three-layered part of the gastrodisc is a much thickened part of it, and is called the embryonal area, for it is here that the embryo arises. Tip to this point the matter which is eventually to becom
. The cat; an introduction to the study of backboned animals, especially mammals. Cats; Anatomy, Comparative. 320 THE CAT. [chap. X. membranes coexist is the germ area, or gastrodisc. In the central portion of this, a third membrane soon makes its appearance (Fig. 144), This is the mcsohlad, and is thought to be derived from the h}7)oblast,''" by sub- divisions of the cells of the letter. The three-layered part of the gastrodisc is a much thickened part of it, and is called the embryonal area, for it is here that the embryo arises. Tip to this point the matter which is eventually to become the body of a cat shows no re- semblance to any animal what- ever. It is but an aggregation of cells of protoplasm arranged as just described, and is rather comparable with some very lowlyorganisedfungus-like plant than with anything we ordi- narily understand as an animal. § 5. It is in the midst of the embryonal area that the first sign of the cat which is to be, is made manifest by the first appearance. Fig. 142.—Longitudinal Section through the Axis OF the Ovum, in which the Epiblastic Cells (c) have almost surrounded the Hypobla-stic ones ((')• il. Central cell. 0. HypoWastic cell, occupying the interspace left at one point by the epiblastic 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. London, Murray
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectanatomy, bookyear1881
