Question

The small intestine is divided into three sections. Name as many of them as you can for one point each. Zero total if you get any wrong.

Answer 1

The small intestine is divided into three sections: the duodenum, which is the first section, the jejunum, which is the middle, and the ileum, which is the end section. All parts have a mucosal lining with villi and microvilli to increase surface area for nutrient absorption.

Step-by-step explanation:

The three sections of the small intestine are:

1. The duodenum, which is the first section that receives partially digested food from the stomach.
2. The jejunum, which is the middle section and roughly 0.9 meters (3 feet) long, is where the majority of nutrient absorption occurs.
3. The ileum, which is the final section, connecting to the large intestine. There is no clear demarcation between the jejunum and the ileum.

All three parts of the small intestine have a mucosal lining that is highly folded and covered with villi and microvilli, which increase the surface area available for digestion and absorption of nutrients.