system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
"Sub-mucosal glands" are present in?
assistant
The correct answer is  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