Regeneration: basic research on living systems, not technology.
Also: starfish
Sea stars can regrow lost arms.
Only what the cited papers report.
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Mladenov and colleagues found arm-tip regrowth in Leptasterias hexactis works without a true blastema but needs scattered cell division.
As reported in: Mladenov, Bisgrove, Asotra et al. (1989). Mechanisms of arm-tip regeneration in the sea star, Leptasterias hexactis. Roux's Archives of Developmental Biology. doi:10.1007/bf00376366
Abstract only
Hernroth and colleagues found organs far from the lost arm of Asterias rubens, including the pyloric caeca, start dividing, suggesting progenitor cells of mixed origin build the new arm.
As reported in: Hernroth, Farahani, Brunborg et al. (2010). Possibility of mixed progenitor cells in sea star arm regeneration. Journal of Experimental Zoology Part B: Molecular and Developmental Evolution. doi:10.1002/jez.b.21352
Abstract only