BIOLOGY OF

click to steer with the mouse · W ahead · S against the current · SPACE hold still · SHIFT faster · A/D R/F drift across the vessel
[ ] the body's clock · P pause it · at a fork you take the way you look · M the map: click a place to go there

BIOLOGY OF

You are smaller than a blood cell, in the right atrium of a living body. The current takes you where the blood goes: the lungs, the heart, out to the brain, the gut, the legs, and back. Steer, hold against the stream, and watch it work.

click to begin