Human Circulatory System Diagram - Arterial & Venous Blood Flow Explained #1499027 (License: Personal Use)

This medical illustration depicts the complete double-loop circulatory system: pulmonary circulation (right heart → lungs → left heart) and systemic circulation (left heart → body tissues → right heart). Arteries carry blood away from the heart (oxygenated except pulmonary artery), veins return blood toward the heart (deoxygenated except pulmonary veins), and capillaries enable gas exchange in lungs and tissues. The aorta, pulmonary artery/vein, arterioles, venules, and tissue capillaries are clearly labeled.

Used in educational healthcare websites, anatomy textbooks, medical student resources, and patient education materials to explain cardiovascular physiology; matches user intent for learning how blood circulates, understanding heart function, or studying oxygen delivery mechanisms.