In systole phase, the ventricles expand and the inflow of blood takes place from the heart to the arteries.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Systole Phase**: The systole phase is part of the cardiac cycle where the heart muscles contract. This phase is crucial for pumping blood out of the heart.

2. **Ventricles' Action During Systole**: During systole, the ventricles do not expand; instead, they contract. This contraction is what allows the heart to push blood into the arteries.

3. **Blood Flow Direction**: The contraction of the ventricles forces blood out of the heart and into the arteries. This is the key function of the systole phase.

...