. Animal biology. Biology; Zoology; Physiology. limentary canal Aortic loop Cerebral ganglion1 Mouth. Capillaries Dorsal blood vessel Anus Ventral ganglia Ovary \ Sub-intestinal Oviduct blood vessel Nephridia Fig. 59. — Diagrams of the body plan of the Earthworm. A and C, longitu- dinal sections; B, transverse section. (From Sedgwick and Wilson.) outer tube forming the body wall, and the inner, the wall of the digestive tract, or alimentary canal. The walls of these tubes merge into each other at both ends, and thus together they enclose a space, the coelom. Or, to state it another way: the ou
. Animal biology. Biology; Zoology; Physiology. limentary canal Aortic loop Cerebral ganglion1 Mouth. Capillaries Dorsal blood vessel Anus Ventral ganglia Ovary \ Sub-intestinal Oviduct blood vessel Nephridia Fig. 59. — Diagrams of the body plan of the Earthworm. A and C, longitu- dinal sections; B, transverse section. (From Sedgwick and Wilson.) outer tube forming the body wall, and the inner, the wall of the digestive tract, or alimentary canal. The walls of these tubes merge into each other at both ends, and thus together they enclose a space, the coelom. Or, to state it another way: the outer tube, or body wall, surrounds a space, the coelom, in which is suspended a second tube, the alimentary canal, which opens to the exterior at either end forming the mouth and anus. (Figs. 59, 60.) The coelom of the Earthworm is divided by a large number of transverse partitions, called septa, which extend from the inner surface of the body wall to the outer surface of the alimentary canal. The result is that the worm's body cavity is not a continuous. 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 Woodruff, Lorande Loss, 1879-1947. New York The Macmillan company
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