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IIUC, it doesn't. Hair grows for a certain time period, falls out, and regrows. The follicle has no knowledge of the length of the hair it is producing, it is s

by mkaic 2y ago

IIUC, it doesn't. Hair grows for a certain time period, falls out, and regrows. The follicle has no knowledge of the length of the hair it is producing, it is simply on a grow-stop-shed cycle with a certain period.

guerrilla 2y ago
So hairs are actually excretions, like sweat and shit.
- bee_rider 2y ago
  What’s the opposite of a fun fact
  - klyrs 2y ago
    Teeth
- mkaic 2y ago
  Exactly. It's like having a bazillion tiny 3D printer extruder nozzles embedded in your skin all on their own timers and flowrates.