<prompt> Median palatal suture is a relief area while making upper edentulous impression because:It overlies nerves and vesselsThis area is prone for resorptionOverlying mucous membrane is thickThe submucosal layer is extremely thin  <response>: MaxillaSupporting structuresHard palaterugaeResidual alveolar ridgemaxillary tuberosityLimiting structures Labial frenumLabial vestibuleBuccal frenumBuccal vestibuleHamular notchFovea palatinePosterior palatal seal areaRelief area:Midpalatine sutureIncisive papillaTorus palatinusStress-bearing areas PrimaryHorizontal slopes of hard palate lateral toMedian suturesSecondaryCrest of the residual alveolar ridgeRugaeMaxillary tuberosity 