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Thermoregulation Homeostasis Simulator

Interactive body-temperature homeostasis simulator: watch the negative-feedback loop that keeps human core temperature near 37°C — sweating and vasodilation cool you down, shivering and vasoconstriction warm you up. Tune ambient temperature, exercise load, insulation and effector sensitivity in real time.

Biology2DEasy60 FPS📱 Mobile-adapted⇄ 3D version

Human core body temperature is held near 37 °C by a hypothalamic negative-feedback loop: a rise above setpoint triggers sweating and vasodilation to shed heat, while a drop below setpoint triggers shivering and vasoconstriction to conserve and produce it. This simulator runs that control loop live — a schematic body reddens or blues with skin blood flow, sweat droplets fall when you overheat, and the figure visibly shivers in the cold — alongside a real-time strip chart of core temperature versus its 37 °C setpoint. Adjust ambient temperature, exercise heat load, clothing insulation and effector sensitivity to see how each reshapes the balance point and how a fever offset forces the same loop to defend a different target.

⚙ Under the hood

This simulation models how the body maintains a stable internal temperature through a feedback loop involving sweating and vasodilation to cool down, or shivering and vasoconstriction to warm up.

physiologybiologythermoregulationhomeostasis

2D · HTML5 Canvas 2D · 60 FPS target · runs fully client-side, no install