. Comparative anatomy. Anatomy, Comparative. THE DIGESTIVE SYSTEM 321 part of the ventral mesentery disappears in ontogenesis. The anterior portion which connects stomach, Hver and ventral body wall only is retained. With the differentiation of the successive regions of the ahmen- tary canal corresponding portions of the dorsal mesentery are recognized as mesogaster, mesentery, mesocolon, and mesorectum. The mesenteries serve not only as means of attachment of the intestine to the body wall, but also as a passage for the blood vessels of the alimentary canal. In the adult the mesenteries becom
. Comparative anatomy. Anatomy, Comparative. THE DIGESTIVE SYSTEM 321 part of the ventral mesentery disappears in ontogenesis. The anterior portion which connects stomach, Hver and ventral body wall only is retained. With the differentiation of the successive regions of the ahmen- tary canal corresponding portions of the dorsal mesentery are recognized as mesogaster, mesentery, mesocolon, and mesorectum. The mesenteries serve not only as means of attachment of the intestine to the body wall, but also as a passage for the blood vessels of the alimentary canal. In the adult the mesenteries become very complex in relations as the result of the elongation of the intestine, formation of omenta, and local adhesions. As the stomach develops its greater curvature it rotates on its long axis so that its left side becomes ventral and the right side dorsal. As a. MESOGASTER GREATER OMENTUM ,' STOMACH DUODENUM-- -CAECUM— APPENDIX- SMALL INTESTINE- COLON YOLK STALK. 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 Neal, Herbert V. (Herbert Vincent), 1869-1940; Rand, Herbert W. (Herbert Wilbur), 1872-1960. Philadelphia : P. Blakiston's Son
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