| Structure and function of the esophagus of the American alligator (Alligator mississippiensis). | |
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MedLine Citation:
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PMID: 16081603 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Esophageal structure and function were studied in juvenile American alligators (Alligator mississippiensis). The anatomy of alligators differs from humans in several important aspects: the crocodilian esophagus is more muscular and is composed entirely of smooth muscle. Functionally, the crocodilian esophagus is similar to that of mammals, but alligators have peak esophageal peristaltic pressures that are 2-3-fold greater than pressures in the human esophagus. As is found in humans, the incidence of esophageal reflux increased in postprandial animals compared with the fasting state. We observed a large increase in pressure in the lower esophageal sphincter (LES) during ventilation that ranged from 200% to 3000% of the pressures measured during apnea. These pressure changes appear to be intrinsic to the LES. Alligators lack a mammalian-type diaphragm; thus, there is no crural diaphragmatic contribution to LES pressure. These features recommend the alligator as a useful model for the study of regulation of the LES. |
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Authors:
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T J Uriona; C G Farmer; J Dazely; F Clayton; J Moore |
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Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S. |
Journal Detail:
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Title: The Journal of experimental biology Volume: 208 ISSN: 0022-0949 ISO Abbreviation: J. Exp. Biol. Publication Date: 2005 Aug |
Date Detail:
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Created Date: 2005-08-05 Completed Date: 2006-02-06 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 0243705 Medline TA: J Exp Biol Country: England |
Other Details:
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Languages: eng Pagination: 3047-53 Citation Subset: IM |
Affiliation:
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Department of Biology, 257 South 1400 East, University of Utah, Salt Lake City, UT 84112, USA. uriona@biology.utah.edu |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Alligators and Crocodiles* Animals Esophageal Sphincter, Lower / physiology* Esophagus / anatomy & histology*, physiology Hydrogen-Ion Concentration Manometry Peristalsis / physiology* Pressure Pulmonary Ventilation / physiology |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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