Human Heart Blood Flow Diagram - Pulmonary Circulation Explained #1820726 (License: Personal Use)

This anatomical illustration depicts the pulmonary circulation loop: deoxygenated blood (blue arrow) enters the right atrium from the superior and inferior vena cava, while oxygenated blood (red arrow) returns from the lungs to the left atrium via pulmonary veins. The diagram highlights key chambers and vessel pathways, emphasizing directional flow critical for understanding cardiac physiology.

Used in medical education, cardiology resources, and health websites to explain basic heart function and pulmonary circulation; targets students, healthcare professionals, and patients seeking foundational cardiovascular knowledge.