This is neat. The lymphatic system is an extra 'blood-type' system, with little physics. What does it actually do for us? Now we know.
It is the drainage system for the brain. It has tiny little pumps that keep the fluid going. It is near the skin, so it was probably added later in evolution, for active brains. Do fish have this system? Worms don't.
It turns out that the pumps are as lazy as me, when it comes to exercising, especially when old. These guys think they can just activate the pumps and everything will be hunkey-dorey. Most likely the pumps get lazy because of blockages upstream. So don't hold your breath on this one.
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