A Tattoo Is Permanent Because Your Immune System Can't Remove It #shorts #tattoo

Tattoo ink particles are deliberately sized to be too large for macrophages to fully break down — so the immune system enters a continuous cycle of absorbing and re-releasing the same pigment as each white blood cell dies and is replaced by another. The ink never moves because it never stops being held. A tattoo isn't a stain in the skin — it's an immune response that has been running on loop since the moment the needle broke the surface.
#sciencefacts #tattoosfacts #immunesystem #biologyfacts #humanbiology #dermisfacts #scienceshorts #skinsience #macrophagefacts #hiddenbiology

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