Muscle fibres having rounded ends are

Options

A. Unstriped muscles
B. Smoothe muscles
C. Striated muscles
D. All the above

Answer

To answer the question "Muscle fibres having rounded ends are:", we will analyze the types of muscle fibers and their characteristics.

### Step-by-Step Solution:

1. **Identify the Types of Muscle Fibers**:
- There are three main types of muscle fibers: skeletal (or striated) muscles, cardiac muscles, and smooth muscles.

2. **Characteristics of Skeletal and Cardiac Muscles**:
- Skeletal muscles are responsible for voluntary movements and are attached to bones. They have a cylindrical shape with striations (bands) and rounded ends.
- Cardiac muscles are found in the heart and are also striated. They have a branched structure with rounded ends.

3. **Characteristics of Smooth Muscles**:
- Smooth muscles are involuntary muscles found in the walls of internal organs. They do not have striations and are spindle-shaped, meaning they taper at both ends.

4. **Determine the Answer**:
- Since the question specifically asks for muscle fibers with rounded ends, we can conclude that both skeletal and cardiac muscles fit this description. However, smooth muscles do not have rounded ends and are not cylindrical.

5. **Final Answer**:
- The correct answer is that muscle fibers having rounded ends are **striated muscles** (which includes both skeletal and cardiac muscles).