❤️ Heart & Circulation

The heart contracts in a "lub-dub" cycle timed by the BPM slider; blood-cell dots stream around the vessel loops and speed up sharply during each beat, exactly like the flow-speed formula in the 3D original.
BPM: 72
Elapsed: 0.0 s
Beats: 0
Pulse phase: 0%
Flow speed: 1.00×
FPS: —