The wall of the internal organs such as blood vessels, stomach and intestine contains which type of muscle tissue?

Options

A. smooth muscle fibre
B. cardiac muscle fibre
C. skeletal muscle fibre
D. Neural tissue

Answer

To answer the question regarding the type of muscle tissue found in the walls of internal organs such as blood vessels, stomach, and intestine, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Types of Muscle Tissue**: There are three main types of muscle tissues in the human body: smooth muscle, cardiac muscle, and skeletal muscle.

2. **Understand Smooth Muscle**: Smooth muscle is characterized as unstriated (non-striated), involuntary, and typically has a spindle shape. It is found in the walls of hollow organs.

3. **Locate Smooth Muscle in Internal Organs**: Smooth muscle is present in the walls of various internal organs, including:
- Blood vessels
- Stomach
- Intestine
- Urinary bladder
- Uterus

4. **Differentiate from Other Muscle Tissues**:
- **Cardiac Muscle**: This type of muscle is striated and found only in the heart.
- **Skeletal Muscle**: This type is also striated and is found in the muscles of the arms, legs, and abdomen.

5. **Eliminate Incorrect Options**:
- Cardiac muscle (B) is not found in the walls of the stomach or intestines.
- Skeletal muscle (C) is not found in internal organs but rather in voluntary muscles.
- Neural tissue (D) is not a muscle tissue at all; it consists of nerve cells.

6. **Conclude with the Correct Answer**: Based on the information gathered, the type of muscle tissue that makes up the walls of internal organs such as blood vessels, stomach, and intestine is **smooth muscle fibers**.

### Final Answer:
The correct answer is **A. Smooth muscle fibers**.

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