Zoology - Digestion and Absorption Question with Solution | TestHub

Innermost mucosa layer of a small intestine has mucosal epithelium which is modified to form the intestinal gland or Crypts of Lieberkuhn to secrete digestive enzymes and villi/microvilli to increase surface area for maximum absorption of food. It also contain goblet cells to secrete mucus. Duodenal glands (or Brunner's glands) are located in the submucosal layer.