<prompt> Diaphragm develops from all except?Septum transversumDorsal mesocardiumPleuroperitoneal membraneCervical myotomes  <response>: Development of diaphramDiaphragm develops from 4 structures derived from mesoderm which unite to form a sheet.Septum transversum :- Gives origin to sternal pa and central tendinous region.Pleuroperitoneal membrane :- Dorsal paired poion.Dorsal mesentry of oesophagus :- Gives origin to crural pa Dorsal unpaired poion.Lateral body walls from cervical myotome :- Gives origin to peripheral costal poion of diaphragm. 