Pharyngeal MusclesPharynxCaenorhabditis elegansEsophageal Sphincter, UpperCaenorhabditis elegans ProteinsMusclesDeglutitionLaryngeal MusclesPharyngeal NeoplasmsPharyngeal DiseasesGene Expression Regulation, DevelopmentalMuscle ProteinsBranchial RegionMuscle, SmoothMuscle, SkeletalGenes, HomeoboxMuscle Fibers, SkeletalMuscle, Smooth, VascularHomeodomain ProteinsMutationMuscle DevelopmentMuscle ContractionMolecular Sequence DataTranscription FactorsBase Sequence