The type of muscle fibre present in the wall of alimentary canal is

Options

A. Smooth muscle fibre
B. striped muscle fibre
C. cardiac muscle fibre
D. both (a) and (b)

Explanation

To determine the type of muscle fiber present in the wall of the alimentary canal, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Muscle Fiber Types**: There are three main types of muscle fibers: skeletal (striated), smooth (visceral), and cardiac. Each type has distinct characteristics and functions.

2. **Identify Skeletal Muscle**: Skeletal muscles are voluntary and striated. They are attached to bones and allow for conscious movement. However, they are not found in the alimentary canal.

3. **Identify Cardiac Muscle**: Cardiac muscles are found exclusively in the heart. They are striated like skeletal muscles but are involuntary. They are not present in the alimentary canal.

4. **Identify Smooth Muscle**: Smooth muscles are found in the walls of internal organs, including the alimentary canal. They are involuntary and do not have striations, giving them a smooth appearance.

5. **Conclusion**: Since the alimentary canal is composed of internal organs (like the stomach and intestines) that require involuntary movement for digestion, the type of muscle fiber present in its wall is smooth muscle fiber.

### Final Answer:
The type of muscle fiber present in the wall of the alimentary canal is **smooth muscle fiber**.

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