Human Circulatory System Anatomy Diagram - Blood Flow & Heart Structure #3623191 (License: Personal Use)

This diagram depicts the complete double-loop circulatory system: pulmonary circulation (right heart → lungs → left heart) and systemic circulation (left heart → body → right heart). Key components include the four cardiac chambers (1, 2, 4, 5), major vessels (aorta, vena cavae, pulmonary arteries/veins), and capillary beds in lungs, head, abdomen, and limbs. Arrows indicate direction of blood flow-blue for deoxygenated, red for oxygenated blood.

Used in biology, anatomy, and physiology educational resources-textbooks, online courses, medical training modules-to teach cardiovascular function. Matches user intent for visual learning, exam prep, or clinical reference.