Human Circulatory System Diagram - Anatomy & Blood Flow Pathways #1499020 (License: Personal Use)

The image illustrates the complete double circulation pathway: deoxygenated blood enters the right atrium via superior/inferior vena cava, passes through the right ventricle to the pulmonary artery and lungs, then returns oxygenated via pulmonary veins to the left atrium and ventricle before being pumped through the aorta to the body. Key structures include the four heart chambers (1, 2, 4, 5), major vessels (3, 6, 7, 8, 9, 10, 11), and capillary beds in lungs, head/forelimbs, and abdominal/hind limb regions.

Used in medical education, biology textbooks, health websites, and patient-facing materials to explain cardiovascular anatomy and hemodynamics; matches user intent for learning or teaching human circulation.