Pectoralis MusclesCockatoosMelopsittacusFlight, AnimalMusclesMesteroloneMuscle DevelopmentChickensMuscle, SkeletalMitochondria, MuscleBiomechanical PhenomenaSurgical FlapsMyosinsMuscle ProteinsChick EmbryoPoland SyndromeMuscle, SmoothMuscle Fibers, SkeletalMuscle ContractionMuscle, Smooth, VascularThoracic Nerves