Question

State three ways in which the layer increases the effectiveness of the small intestine for absorption of nutrients.

Answer 1

1. The small intestine has villi and microvilli, increasing the surface area of the intestine and helping with absorption.

2. It is also very long, increasing surface area in which absorption occurs, and it makes twists and curves so it fits inside the abdominal area. The small intestine of an adult has approximately 23 feet.

3. The small intestine also has contractions, called peristalsis, a wavelike muscular movement propelling foods to move through the layer of absorption.