. Elements of zoology, to accompany the field and laboratory study of animals. Zoology. THE DEVELOPMENT OF THE FIiOG\S EGG 45o rolled in to form the })cginnings of the food canal (Fig. 407 H). Next, on the future dorsal side of the embryo, two ridges arise with a furrow between them; they are the beginnings of the brain and spinal cord (Fig. 409). When the furrow is closed by the ridges folding over it, the central nerve tube is formed and begins to sink into the body. Later the trunk elongates, nerves and muscles are formed, gills sprout out, and the tad- pole is formed (Fig. 410).. Please no
. Elements of zoology, to accompany the field and laboratory study of animals. Zoology. THE DEVELOPMENT OF THE FIiOG\S EGG 45o rolled in to form the })cginnings of the food canal (Fig. 407 H). Next, on the future dorsal side of the embryo, two ridges arise with a furrow between them; they are the beginnings of the brain and spinal cord (Fig. 409). When the furrow is closed by the ridges folding over it, the central nerve tube is formed and begins to sink into the body. Later the trunk elongates, nerves and muscles are formed, gills sprout out, and the tad- pole is formed (Fig. 410).. 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 Davenport, Charles Benedict, 1866-1944; Davenport, Gertrude Anna Crotty, 1866- joint author. New York, Macmillan
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectzoology, bookyear1911
