Studies on the anatomy and histology of the foregut in Ligia exotica Roux (Crustacea: Isopoda)
Kumari, C.J.; Rao, K.H.; Shyamasundari, K.
Folia Morphologica 32(2): 168-175
1984
ISSN/ISBN: 0015-5640 PMID: 6469146 Document Number: 227713
The digestive tract of Ligia exotica is a straight tube consisting of a foregut, a midgut and a hindgut. The foregut is differentiated to an esophagus and a cardiac and a pyloric stomach. The esophagus and stomach are histologically similar; in each the wall consists of scattered longitudinal muscle bundles, a continuous band of circular muscle, epithelial mucosa and a thick internal layer. The wall of the cardiac and the pyloric stomach is arranged in complicated folds forming a number of ampullae and lamellae. The cardiac stomach is an elaborate gastric mill system forming a triturating apparatus. The pyloric stomach is a straining and filtering apparatus.