part_of area hypopharynx distal hypopharynx HAO:0001575 The area that is located on the anterior surface of the hypopharyngeal wall and is delimited proximally by the infrabuccal pouch or the distal margin of the sitophore, distally by the salivarial orifice and laterally by the lateral parts of the prementum and the hypopharyngeal rods. labial portion of the hypopharynx