Explain the flow of blood in the cardiac phase where contraction of the blood vessels take place.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Cardiac Cycle:**
- The cardiac cycle consists of two main phases: diastole (relaxation) and systole (contraction). In this question, we focus on the systolic phase.

2. **What Happens During Systole:**
- During systole, the heart muscles contract. This contraction occurs primarily in the ventricles, which are the lower chambers of the heart.

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