Human Heart Anatomy Diagram - Labeled Structure and Blood Flow #1820937 (License: Personal Use)

This hand-drawn medical illustration depicts a sagittal section of the human heart, clearly labeling the right and left atria and ventricles, pulmonary artery, aorta, and key valves including the mitral and tricuspid. Color coding distinguishes deoxygenated (blue) and oxygenated (red) blood flow through systemic and pulmonary circuits. The stippled shading enhances depth and tissue differentiation for educational clarity.

Used in medical education websites, anatomy e-learning modules, and healthcare patient resources to explain cardiac structure and circulation; matches user intent for visual learning, study aids, or clinical reference.