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Mechanical tipping point behind sudden fibrosis — Level A1 — Junction Node Between Hypotocotyl and Radicle in Zea Mays Embryo cross section: Zea may embryo common name: corn grain magnification: 100x Triarch quadruple stain https://www.flickr.com/photos/146824358@N03/47638340582/

Mechanical tipping point behind sudden fibrosisCEFR A1

2 Dec 2025

LevelA1
A2
B1
B2

Adapted from Washington U. in St. Louis, Futurity • CC BY 4.0

Photo by Bioscience Image Library by Fayette Reynolds, Unsplash

Level A1 – Beginner
2 min
71 words
  • Scientists study cells in tissues.
  • They study why fibrosis can start suddenly.
  • Fibrosis is too much scarring in organs.
  • Groups of cells can switch from healthy to sick fast.
  • A mechanical tipping point makes the switch happen.
  • The switch depends on how far cells are apart.
  • Collagen fibers help send force signals between cells.
  • More collagen crosslinking makes cells activate and stiffen tissue.
  • This change is like water freezing to ice.

Difficult words

  • fibrosis — a disease with too much scar tissue in organs
  • scarring — thick tissue that forms after an injury
  • tissue — a group of cells in a body part
    tissues
  • collagen — a protein that makes body tissue strong
  • activate — to make cells start working or change
  • stiffen — to become harder or less flexible
  • tipping point — the moment when a small change causes a big switch

Tip: hover, focus or tap highlighted words in the article to see quick definitions while you read or listen.

Discussion questions

  • Do you have a scar?
  • Have you learned about cells at school?
  • Do you know when water freezes to ice?

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