Draw a sectional view of the human heart and label on it, aorta, right ventricle, pulmonary vein, pulmonary artery

Explanation

### Step-by-Step Solution:

1. **Draw the Outline of the Heart**: Start by sketching the general shape of the human heart. The heart is roughly cone-shaped, with a wider top (base) and a pointed bottom (apex).

2. **Add the Four Chambers**:
- Draw two upper chambers (atria) and two lower chambers (ventricles).
- The right atrium is located at the top right, while the left atrium is at the top left.
- The right ventricle is below the right atrium, and the left ventricle is below the left atrium.
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