Select the incorrect option regarding digestion and absorption of substances in different parts of digestive system

Options

A. In large intestine, absorption of water, some minerals and drugs takes place
B. Absorption of water, simple sugars and alcohol takes place in stomach
C. Small intestine is the principal organ for absorption of nutrients
D. The digestion is completed in large intestine

Answer

To solve the question of selecting the incorrect option regarding digestion and absorption of substances in different parts of the digestive system, we will analyze each option provided.

### Step-by-Step Solution:

1. **Understanding the Role of the Large Intestine**:
- The large intestine primarily absorbs water, minerals, and some drugs. It does not engage in digestion.
- **Conclusion**: The statement about absorption in the large intestine is correct.

2. **Absorption in the Stomach**:
- The stomach does absorb some substances, including water, simple sugars, and alcohol. The presence of gastric juices aids in the digestion of food, and some of these digested components can be absorbed.
- **Conclusion**: The statement regarding absorption of water, simple sugars, and alcohol in the stomach is also correct.

3. **Function of the Small Intestine**:
- The small intestine is indeed the principal organ for the absorption of nutrients. It has villi that increase the surface area for maximum nutrient absorption.
- **Conclusion**: The statement about the small intestine being the principal organ for absorption is correct.

4. **Digestion in the Large Intestine**:
- The statement that digestion is completed in the large intestine is incorrect. The large intestine primarily functions in the absorption of water and the formation of stool, with no significant digestive processes occurring.
- **Conclusion**: This statement is incorrect.

### Final Answer:
The incorrect option regarding digestion and absorption of substances in different parts of the digestive system is: **"The digestion is completed in the large intestine."**

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