15 Questions
What is the characteristic feature of the epithelium in the stomach?
Gastric pits
Which of the following is NOT associated with the small intestine?
Haustra
What is the name of the folds in the epithelium of the esophagus?
None
Which of the following is associated with the large intestine?
Haustra
What is the name of the folds in the epithelium of the stomach?
Rugae
What type of epithelium is present in the lining epithelium of the mucosa?
Stratified squamous non-keratinized
Which of the following layers of the mucosa sits on a basement membrane?
Lining epithelium
What is the composition of the lamina propria in the mucosa?
Loose connective tissue
What is the term for the mucosa?
Mucous membrane
How many sub-layers does the mucosa have?
Three
Which part of the gastrointestinal tract lacks specialized structures in the submucosa?
Stomach
What type of glands are found in the submucosa of the duodenum?
Brunner's glands
What are the specialized structures found in the submucosa of the esophagus?
Submucosal mucous glands
What type of glands are absent in the submucosa of the large intestine?
All of the above
Which part of the gastrointestinal tract contains Peyer's Patches in the submucosa?
Ileum
Study Notes
Mucosa
- Composed of three sub-layers: lining epithelium, lamina propria, and muscularis mucosae
- Lining epithelium: made of simple columnar epithelium or stratified squamous non-keratinized epithelium, sits on a basement membrane
- Lamina propria: loose connective tissue
Organ Folds of the Epithelium
- Esophagus: none
- Stomach: rugae (large folds) and gastric pits (small folds)
- Small Intestine: plicae circulares (circular folds) and villi (finger-like projections)
- Large Intestine: haustra (sac-like folds)
Specialized Structures in the Submucosa
- Esophagus: submucosal mucous glands
- Stomach: none
- Duodenum: Brunner's glands
- Ileum: Peyer's patches
- Large Intestine: none
Test your knowledge of the histology of the mucosa and organ folds in the digestive system, including the esophagus, stomach, small intestine, and large intestine. Identify the different types of folds, pits, and villi in each organ. This quiz is perfect for students of anatomy and physiology.
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