🫀 Guyton Circulation Lab: Cardiac Output, Venous Return and Blood Volume in a Closed-Loop Heart Model

A 3D heart in a closed loop of vessels with moving blood cells: change blood volume, heart rate, contractility, vessel resistance and venous tone and watch the circulation settle where the heart's pumping curve crosses the venous-return line (Guyton's graph). Includes pressure traces, a pressure-volume loop, haemorrhage, exercise, heart failure and shock scenarios, an optional baroreflex and checks against closed-form results. Educational only.