. Comparative anatomy and physiology. 300 COMPARATIVE ANATOMY AND PHYSIOLOGY. example, four apodemes are well developed between every two thoracic somites ; the inner pair unite above and below so as to form a closed canal, the ster- nal canal; with these, on either side, one of the outer apodemes becomes con- nected, and, as it also becomes connected with the apodemes behind it, the several parts are united into a continuous and substantial in- ternal support- ing and protec- tive mass, which, in addition to its other functions, affords attach- ment to mus- cles. The skeleton may gain in pro-
. Comparative anatomy and physiology. 300 COMPARATIVE ANATOMY AND PHYSIOLOGY. example, four apodemes are well developed between every two thoracic somites ; the inner pair unite above and below so as to form a closed canal, the ster- nal canal; with these, on either side, one of the outer apodemes becomes con- nected, and, as it also becomes connected with the apodemes behind it, the several parts are united into a continuous and substantial in- ternal support- ing and protec- tive mass, which, in addition to its other functions, affords attach- ment to mus- cles. The skeleton may gain in pro- tective or defen- sive power by the development of spines, pro- Fig. 124.—The King-Crab (Limulus moluccanus). cesses or knobs which resist the attacks of enemies, or are able to passively inflict in- jury upon them; sometimes, indeed, they almost come. 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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Keywords: ., bookcentury1800, bookdecade1880, bookpublisherlondo, bookyear1885
