Villus structure and function

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Presentation transcript:

Villus structure and function How is its structure related to its role in absorption and transport of the products of digestion ?

Villi on the walls of the small intestine There are folds in the walls of the intestines. The walls of these folds are covered in villi.

A Villus – it’s structure Describe the shape: What is inside a villus? What are the surface cells called?

A Villus – how does each part help to do absorption of digested nutrients? Epithelial cells: Blood Capillaries: Lacteal:

A Villus – how does each cell transport nutrients away from the small intestine lumen? Epithelial cells: Blood Capillaries: Lacteal:

Summary What are the key points to remember about: Structure of Villus Absorption of digested nutrients Transport of absorbed nutrients