List two structural adaptations in striated muscle fibres to draw more energy.

Explanation

**Step-by-Step Solution:**

1. **Understanding Striated Muscle Fibers**: Striated muscle fibers, also known as skeletal muscle fibers, are responsible for voluntary movements in the body. They are characterized by their striated appearance under a microscope.

2. **High Vascularization**: One key structural adaptation of striated muscle fibers is that they are highly vascularized. This means that there is a rich supply of blood vessels in these muscles. The increased blood supply ensures that oxygen and nutrients are delivered efficiently to the muscle cells, which is essential for energy production.

3. **Presence of Mitochondria**: Another important adaptation is the presence of a large number of mitochondria within the striated muscle fibers. Mitochondria are known as the powerhouse of the cell because they are responsible for producing adenosine triphosphate (ATP), which is the primary energy currency of the cell. More mitochondria mean that the muscle fibers can generate more ATP, thereby drawing more energy.

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