It is known that red muscle fibres in animals can work for longer periods of time continuously. How is this possible ?

Explanation

### Step-by-Step Solution:

1. **Understanding Muscle Fiber Types**:
- Muscle fibers in animals can be classified into two main types: red muscle fibers and white muscle fibers.
- Red muscle fibers are known for their endurance and ability to work continuously for longer periods.

2. **Color Difference**:
- The primary difference between red and white muscle fibers is their color. Red muscle fibers appear red due to the presence of a specific pigment.
...