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The epithelium of the gastro-intestinal tract of Polypterus senegalus (Pisces:Brachiopterygii)

✍ Scribed by A. M. Abdel Magid

Publisher
John Wiley and Sons
Year
1975
Tongue
English
Weight
749 KB
Volume
146
Category
Article
ISSN
0362-2525

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✦ Synopsis

Abstract

Light and electron microscopic studies revealed ciliation of the epithelium of the entire gastro‐intestinal tract of Polypterus. Acidophil cells were found in the different regions of the alimentary canal, including its derivatives (the lungs and hepato‐pancreatic ducts). Compared to other primitive forms and modern teleosts, the extreme fusion of the intestinal caeca in Polypterus, the ciliation and the overall dispersion of acidophil cells may represent a special organization inherited from a palaeoniscoid ancestor. Attention is also drawn to a possible channel of early evolution and function of the stomach diverticulum.

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