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Humans with longer-lived cells

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Lots of human cells are constantly dying and being replaced. How different would a human-like creature be if most cells (excluding brain cells) had longer lifespans (5 times longer, or even more)?

As to how different, I mean in these regards:

  • General lifespan.
  • How much more (or less) they'd have to eat compared to humans.
  • How prone they'd be to disease compared to humans.

As for which kinds of cells, I'm thinking mostly on the lines of skin, muscle, bone, red and white blood cells, and some internal organs like lungs and heart.

Edit: I was also hoping that, while the cells of this species would take longer to die on their own, cells killed or damaged by external factors would be replaced just as quickly as ours. Would that be possible, or would this trait break the initial premise of the question?

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This post was sourced from https://worldbuilding.stackexchange.com/q/156505. It is licensed under CC BY-SA 4.0.

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