Human Heart Anatomy Diagram - Chambers, Valves, and Blood Flow Pathways #1821082 (License: Personal Use)

The illustration depicts a cross-section of the human heart with 15 numbered structures-including the superior/inferior vena cava, pulmonary arteries/veins, aorta, atria, ventricles, and valves-along with color-coded blood flow: blue for deoxygenated blood and red for oxygenated blood. Arrows trace the complete circulatory pathway from systemic return to pulmonary circulation and back to systemic delivery. Labels correspond to standard anatomical terminology used in medical education.

This image is commonly used in biology, physiology, and medical education web pages, textbooks, or e-learning modules to teach cardiac anatomy and hemodynamics. It serves users seeking foundational understanding of heart function, especially students, teachers, and healthcare trainees.