Full Palatopharyngeal Arch and Palatopharyngeus Muscle Description
[Continued from above] . . . lower part. It is thicker at the ends than it is in the middle; along with the mucous membrane, which covers its entire surface, this muscle forms the palatopharyngeal arch.
This arch is the last of the two mucous membrane folds on either side of the oral part of the pharynx (which extends from the uvula to the hyoid bone). Its purpose is to surround the palatopharyngeus muscle and be the fauces' posterior pillar.