"Sub-mucosal glands" are present in?
Duodenum and oesophagus have submucosal glands. The submucosa of the duodenum is densely packed with mucous Brunner&;s glands.The oesophagus has occasional submucosal mucous glands.Reference: Chaurasia; 6th edition
Duodenum
Colon
Anal canal
Stomach
Abdomen and pelvis