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Cardiac Cycle & Circulatory Loop Simulator

Interactive 3D model of the heart's four chambers, valves and the full systemic + pulmonary circulatory loop: watch blood flow driven by the cardiac cycle, tune heart rate and stroke volume, and click any chamber, valve, or organ to inspect it.

Medicine & Biophysics3DEasy60 FPS

A 3D model of the heart's four chambers, its four valves, and the single closed loop blood travels through the body — the systemic circuit and the pulmonary circuit joined in series. Adjust heart rate and stroke volume to see how the cardiac cycle and cardiac output respond, and click any chamber, valve, or organ to inspect it.

⚙ Under the hood

3D model of the heart's four chambers and valves driving blood around the closed systemic + pulmonary circulatory loop, with tunable heart rate and stroke volume.

Three.jsBiologyMedicineCardiovascularAnatomy

3D · Three.js / WebGL renderer · 60 FPS target · runs fully client-side, no install