Anatomy - Histology of the Stomach & Small Intestine

The video tutorial covers the histology of the digestive tract, focusing on the stomach and small intestine. It explains the distinguishing features of the esophagus, stomach, and small intestine, such as the types of epithelium, presence of goblet cells, and specific structures like rugae and villi. The tutorial also details the muscular layers of the stomach and how to identify them. The small intestine's unique features, including villi and their role in forming the brush border, are highlighted. The video aims to help students differentiate between these digestive tract sections using histological characteristics.

Which type of epithelium is unique to the esophagus?

• Cuboidal epithelium

• Stratified squamous epithelium

• Pseudostratified columnar epithelium

• Simple columnar epithelium

What is the primary function of gastric glands in the stomach?

• Generate mucus to protect the stomach lining

• Absorb nutrients

• Produce hydrochloric acid

• Secrete digestive enzymes

What feature distinguishes the stomach's muscularis externa from other digestive tract segments?

• Presence of a longitudinal layer

• Presence of a serosa

• Presence of a circular layer

• Presence of an oblique layer

What is the primary function of the rugae in the stomach?

• Increase surface area for absorption

• Allow the stomach to expand

• Secrete digestive enzymes

• Protect the stomach lining

Which layer of the stomach is responsible for its ability to churn food?

• Lamina propria

• Muscularis mucosa

• Submucosa

• Muscularis externa

What are the finger-like projections in the small intestine called?

• Crypts

• Gastric pits

• Villi

• Rugae

What is the main role of goblet cells in the small intestine?

• Secrete digestive enzymes

• Secrete mucus for lubrication

• Absorb nutrients

• Produce hydrochloric acid

Which layer is directly beneath the simple columnar epithelium in the small intestine?

• Muscularis mucosa

• Lamina propria

• Submucosa

• Serosa

How can you differentiate between the stomach and small intestine histologically?

• Presence of gastric pits

• Presence of villi

• Presence of goblet cells

• Presence of rugae

What is the main histological feature used to identify the small intestine?

• Gastric pits

• Rugae

• Villi

• Goblet cells