. Comparative anatomy and physiology. 46 COMPARATIVE ANATOMY AND PHYSIOLOGY. that the mesoblast becomes separated into two layers, one of which applies itself to the epiblast, and the other to the hypoblast; in this way we get the somatopleure and splanclmopleure of. Fig. 16.—Venus' Girdle (Cestus veneria). embryologists. All the Metazoa that possess this body cavity may be spoken of collectively as the Cflplomata. In some cases the ccelom remains throughout life in a vory rudimentary condition, and in a few it cannot be said to be developed at all, while in others it would seem to have been l
. Comparative anatomy and physiology. 46 COMPARATIVE ANATOMY AND PHYSIOLOGY. that the mesoblast becomes separated into two layers, one of which applies itself to the epiblast, and the other to the hypoblast; in this way we get the somatopleure and splanclmopleure of. Fig. 16.—Venus' Girdle (Cestus veneria). embryologists. All the Metazoa that possess this body cavity may be spoken of collectively as the Cflplomata. In some cases the ccelom remains throughout life in a vory rudimentary condition, and in a few it cannot be said to be developed at all, while in others it would seem to have been lost by degeneration. According to its mode of origin, as an out-growth from the enteron, or by cleavage of the mesoblast, it is spoken of as an eiiteroccele, or a 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 Bell, F. J. (Francis Jeffrey), 1855-1924. London, Cassell
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