Polyploid newt kidney tubules use fewer, larger cells to maintain identical organ-level structure

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• Polyploid newts maintain normal kidney tubule diameters using fewer, larger cells.finding0.929
  Fankhauser 1945 finding on anatomical regulation despite ploidy changes.
• Polyploid newts maintain normal kidney tubule size via cell number adjustment or single-cell wrapping, using different molecular mechanisms.finding0.916
  From Fankhauser 1945; illustrates top-down control where large-scale morphology is maintained despite drastically wrong cell size.
• Newt kidney tubule cells produce correct tubule diameter using fewer cells when cell size is enlarged; a single enlarged cell can loop to achieve the same diameter (Fankhauser 1945).finding0.874
  Shows multi-scale anatomical homeostasis using different cellular mechanisms.
• Polyploid Newt Kidney Tubule Adaptationfinding0.861
  Engineered polyploid newts with abnormally large cells and extra chromosomes develop normal kidney tubule diameters by switching molecular mechanisms on-the-fly.
• Newt kidney tubule lumen diameter is maintained with fewer, larger cells by switching to a single-cell wrapping mechanismfinding0.855
  When cell size is artificially enlarged, tubule formation adapts by reducing cell count and eventually using cytoskeletal bending within one cell.
• Single newt cell can wrap around itself to form a kidney tubule when cell size is artificially increased.finding0.854
  From Fankhauser (1945), demonstrates diverse molecular mechanisms serving a higher-level anatomical specification.
• Enlarged newt cells compensate for increased size by adjusting cell number and can form kidney tubule from a single cell wrapped around itself.finding0.850
  When cell size was doubled, tubules used fewer cells; when quadrupled, a single cell formed the tubule by cytoskeletal deformation, maintaining correct lumen diameter.
• Newt kidney tubule cells, when artificially enlarged, can bend a single cell around itself to achieve correct tubule diameter, illustrating top-down control over molecular mechanisms.claim0.842
  Extreme example of regulative flexibility.