Human Heart Anatomy Diagram - Labeled Cardiovascular System Illustration #1821090 (License: Personal Use)

This educational illustration depicts the human heart with major structures including the aorta, pulmonary artery, superior and inferior vena cava, and coronary arteries. Red vessels represent systemic arterial circulation carrying oxygenated blood, while blue vessels indicate venous return of deoxygenated blood to the heart. The image is ideal for teaching cardiovascular physiology and anatomy fundamentals.

Used in medical textbooks, health education websites, biology classrooms, and patient-facing materials to explain heart structure and blood flow; matches user intent for learning or reviewing cardiac anatomy.