Intestinal Structure and Function

The video provides a detailed view of the small intestine's structure, focusing on the duodenum. It explains the different layers of the intestinal wall: mucosa, submucosa, muscularis, and serosa. The video highlights the role of villi in nutrient absorption, including the function of goblet cells and capillaries. It also discusses the lacteal's role in fat absorption and the lymphatic system. Finally, it covers the muscularis layers and the presence of lymphatic nodules containing B and T cells.

What is the first part of the small intestine called?

• Colon

• Ileum

• Jejunum

• Duodenum

Which layer of the intestinal wall is closest to the food?

• Submucosa

• Muscularis

• Mucosa

• Serosa

What is the outermost layer of the intestine called?

• Muscularis

• Serosa

• Submucosa

• Mucosa

What are the finger-like structures in the intestine called?

• Villi

• Cilia

• Papillae

• Microvilli

What type of cells produce mucus in the intestinal lining?

• Parietal cells

• Enterocytes

• Goblet cells

• Chief cells

What is the function of the lacteal in the villi?

• Produce enzymes

• Absorb fats

• Transport oxygen

• Absorb carbohydrates

What divides the mucosa from the submucosa?

• Serosa

• Circular layer

• Longitudinal layer

• Muscularis mucosae

What are lymphatic nodules composed of?

• Epithelial cells

• Goblet cells

• B cells and T cells

• Red blood cells

Which layer of the muscularis is circular?

• Outer layer

• Inner layer

• Longitudinal layer

• Serosa

How are the fibers in the longitudinal layer arranged?

• Circularly

• Randomly

• Diagonally

• Lengthwise