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Small Intestine Structure/Function

Small Intestine Structure/Function

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This lesson will examine the structure of the small intestine and its role in digestion.

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Tutorial
Terms to Know
Amylase

An enzyme that breaks down carbohydrates in the digestive system.

Duodenum

The first section of the small intestine.

Ileum

The last section of the small intestine which connects to the large intestine.

Jejunum

The middle section of the small intestine.

Lipase

An enzyme that breaks down fats in the digestive system.

Microvilli

Hair-like projections that cover villi and aid in absorption of nutrients.

Peristalsis

Wave-like muscle contractions that push contents through the small intestine.

Small Intestine

A part of the digestive tract where the majority of nutrients are absorbed.

Villi

Small finger-like projections that line the mucosa and act to increase surface area and absorb nutrients.