Regrowing Limbs: Can People Regenerate Body Parts?

Regrowing Limbs: Can People Regenerate Body Parts?

Thus, our studies of salamanders are revealing that the regeneration process can be divided into pivotal stages, beginning with the wound-healing response, followed by the formation of a blastema by cells that revert to some degree to an embryonic state, and finally, the initiation of a developmental program to build the new limb. As we move toward the challenge of inducing limb regeneration in humans, we rely on these insights to guide our efforts. Indeed, the hardest things to discover in science are those that do not already occur, and limb regeneration in humans fits snugly into this category, although that does not mean humans have no natural regenerative capacity.

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