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Cellular or Celestial? A tapestry of stars, like "the heavens' embroidered cloths, enwrought with golden and silver light", astrocytes tile the entire central nervous system in a continuous and essentially non-overlapping manner that is orderly and well organized. A single astrocyte may contact 100,000 synapses!
Astrocytes regulate blood flow to neurons, release gliotransmitters and signal one another through calcium waves.
