why our body is able to self heal but it will stop working and let us die when we get old?
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Think of the regenerative ability of your body like a car engine. When we are in our younger years, our body is like a car engine that is well-maintained. It runs smoothly and efficiently, and can handle any bumps in the road – just like our body can heal and repair any injuries sustained. As we age, our “car engine” suffers from wear and tear and its performance deteriorates.
That’s the ELI5 version, without getting into decline in cellular activity, decrease in the ability to repair damaged proteins, etc.
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