Peristaltic movements found in differnet parts of alimentary canal. In which one of these there is least peristalsis -

Options

A. Stomach , acidic
B. Duodenum
C. Rectum
D. Oesophagus

Answer

To determine which part of the alimentary canal exhibits the least peristalsis, we need to analyze the peristaltic movements in each of the given options: stomach, duodenum, rectum, and esophagus.

### Step-by-Step Solution:

1. **Understanding Peristalsis**:
- Peristalsis refers to the rhythmic contraction and relaxation of muscles in the alimentary canal that helps in moving food along the digestive tract.

2. **Analyzing Each Option**:
- **Stomach**:
- The stomach has three layers of muscle and exhibits strong peristaltic movements to mix and propel food into the small intestine.
- **Duodenum**:
- The duodenum is the first part of the small intestine and also shows peristalsis to move the chyme further along the digestive tract.
- **Esophagus**:
- The esophagus, or food pipe, uses peristalsis to push food from the throat to the stomach.
- **Rectum**:
- The rectum is the final section of the large intestine. It is primarily a storage area for feces and exhibits the least peristalsis compared to other sections.

3. **Conclusion**:
- Among the options, the rectum has the least peristalsis because it is mainly involved in the storage of feces rather than actively moving food.

### Final Answer:
The part of the alimentary canal that exhibits the least peristalsis is the **rectum**.

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