Human Circulatory System Diagram - Pulmonary & Systemic Circulation Explained #3623205 (License: Personal Use)

The image depicts the dual-loop circulatory system: deoxygenated blood travels from the body via veins to the right heart, then to the lungs via pulmonary arteries; oxygenated blood returns via pulmonary veins to the left heart and is pumped systemically through arteries to tissues. Arterial circulation (red) delivers oxygen-rich blood, while venous circulation (blue) returns deoxygenated blood, with capillaries facilitating gas and nutrient exchange.

Used in biology, anatomy, and physiology educational resources-textbooks, online courses, or medical websites-to help learners visualize blood flow pathways and understand cardiovascular function.