<prompt> Which of the following structures are not involved in development of diaphragm?Somatic body wallSeptum transversumPleuroperitoneal membranePleuropericardial membrane  <response>: Ans: D. Pleuropericardial membranePleuropericardial membrane:Supradiaphragmatic structure.Not involved in formation of diaphragm.Development of Diaphragm:Septum transversum - Central tendon.Pleuroperitoneal membranes - Small intermediate muscular poione.Mesentery of esophagus - Crurae.Body wall - Peripheral muscular diaphragm.Cervical myotomes muscular input. 