Interstitium Unveiled: The Body's Hidden Fluid Highway

TL;DR
Researchers describe the interstitium as an interconnected network of fluid-filled spaces in connective tissue, revealing a third circulatory system that links skin, fascia, and organs; this could explain acupuncture's mechanisms, influence fat biology and inflammatory bowel disease, and shed light on how cancer spreads, with potential new therapeutic targets.
Inside the Interstitium, the Human Body’s Hidden Pathways The New York Times
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