Into how many parts is the small intestine divided?

Correct option is B

The correct answer is option (b) Three.

Explanation

The small intestine is divided into three main parts:

1. Duodenum – The first and shortest section of the small intestine, where most of the chemical digestion occurs with the help of enzymes and bile.

2. Jejunum – The middle section, where most of the nutrient absorption takes place.

3. Ileum – The final and longest section, which absorbs nutrients that were not absorbed by the jejunum and connects to the large intestine.

These three sections work together to digest food and absorb nutrients from it. The structure of the small intestine, with its villi (small finger-like projections), increases the surface area, making nutrient absorption more efficient.

Information Booster

• The small intestine is about 6 meters long in adults.

• The duodenum is responsible for mixing bile and digestive enzymes with food to break it down.

• The jejunum is highly vascular and has a large surface area for nutrient absorption.

• The ileum absorbs vitamins B12 and bile acids before the remaining waste enters the large intestine.

Additional Knowledge

• Option (a) Four: This is incorrect. The small intestine is not divided into four parts; it is divided into three: duodenum, jejunum, and ileum.

• Option (b) Three: This is the correct answer. The small intestine has three parts: duodenum, jejunum, and ileum. These sections perform specialized functions for digestion and absorption.

• Option (c) Eight: This is incorrect. The small intestine does not have eight distinct sections. It only consists of three parts.

• Option (d) Ten: This is incorrect. The small intestine is not divided into ten parts. It has three sections as mentioned earlier.