Muscular contraction of Alimentary canal are-

Options

A. Circulation
B. Deglutition
C. Churning
D. Peristalsis

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the type of muscular contractions that occur in the alimentary canal.

2. **Identifying Options**: The options provided include circulation, deglutition, churning, and peristalsis. We need to evaluate each option to determine which one describes the muscular contractions of the alimentary canal.

3. **Evaluating Each Option**:
- **Circulation**: This term generally refers to the movement of blood through the circulatory system and does not pertain to the muscular contractions of the alimentary canal. Therefore, this option is incorrect.

- **Deglutition**: This term refers to the act of swallowing, which involves moving food from the mouth to the esophagus and then to the stomach. While it involves muscular actions, it is not the term that describes the general contractions of the alimentary canal. Thus, this option is also incorrect.

- **Churning**: This term refers to the mixing of food, particularly in the stomach and large intestine. While it involves muscular action, it does not describe the coordinated contractions that move food through the entire alimentary canal. Therefore, this option is incorrect as well.

- **Peristalsis**: This is the correct term. Peristalsis refers to the wave-like muscular contractions that occur throughout the alimentary canal, which help to push the bolus (a mass of food) forward. This movement is facilitated by the coordinated contractions of two layers of muscles in the muscularis layer—circular and longitudinal muscles.

4. **Conclusion**: After evaluating all the options, the correct answer is peristalsis, as it specifically describes the muscular contractions of the alimentary canal.

**Final Answer**: The muscular contractions of the alimentary canal are peristalsis.

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