Break It To Make It: How Fracturing Sculpts Tissues and Organs

There’s a moment, just before the tight mass of cells that is a developing mouse embryo implants itself in the womb, that it all comes apart. Hundreds of tiny fluid-filled bubbles expand between each of the orb’s few dozen cells. The bubbles grow and press outward on cell membranes — and then, in a moment of fracture, pry them apart. Thin protein stands tether the cells together as the…

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