there are many enzymes in stomach along with an acid called hydrochloric acid. the other enzymes present are pepsin which converts proteins to peptons and amino acids.Amylase is added to food in the mouth from saliva.Renin helps in digestion of milk. These partially digest the food in stomach.The remaining nutrients are degraded by pancreatic juice from pancreas and pigments from bile juice helps in emulsifying fats.Hope this helps :)