Human Heart Anatomy Diagram - Educational Medical Illustration #3262853 (License: Personal Use)

This educational diagram displays a sagittal cross-section of the human heart, revealing the right and left atria and ventricles, the tricuspid and mitral valves, and the pulmonary artery and aorta. The illustration uses color coding-red for oxygenated blood pathways and blue-gray for deoxygenated-to clarify circulation flow. It is designed for clarity in teaching cardiovascular anatomy and physiology.

Used in biology, anatomy, and health education resources-especially K-12 and introductory college courses-to help learners visualize heart structure and function. Matches user intent for studying or teaching circulatory system basics.