<prompt> Catgut is prepared from submucosal layer of the intestine of:CatSheepHuman beingRabbit  <response>: Ans. b SheepRef: Bailey 261e p37-38Catgut points: Discovered by John Hunter Plain catgut is derived from Sheep submucosa of intestine Plain catgut loses its strength by 50 in 3 days- Complete strength lost by 15 days and absorbed in 60 days Isopropyl alcohol is used to preserve catgut. 