A sphincter that is part of an esophagus. [ http://orcid.org/0000-0002-6601-2165 ]
This is just here as a test because I lose it
Term information
database
cross reference
- SCTID:277765007
editor note
check for specific subtypes across species. Note mammals have upper and lower, but lower is really part of cardia and thus is not classified under here