All the blood from your stomach and intestines passes through your liver. Kupffer cells wait there to catch germs and worn-out blood cells.
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Your liver is a big organ on the right side of your belly. Blood flows through it in narrow channels called sinusoids.
Kupffer cells are macrophages that live inside these channels. They hold on to the walls with long, bendy arms and reach into the passing blood.
Kupffer cells are one of the biggest groups of macrophages in your whole body.
Press Catch an old cell on the 3D model and watch the Kupffer cell grab a worn-out red blood cell.