It occupies the hepatic and post-hepatic region of trunk.The hepatic region of the intestine is highly vascular.Its epithelial cells are dark green or dark wall forms numerous sacculation called hepatic caeca.The intestine wall lies in close contact with the body wall,so that the intestine sacculation correspond with those of the body wall.The post-hepatic region of intestine is connected with the ventral body wall by the pygochord described earlier. It is a simple and straight tube bearing a dorso-lateral grooves lined by tall epitheliar cells with long cilia.
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