Eli5: if our bodies are able to form entire human beings from scratch, why can’t it grow back organs that have been amputated?
In: Biology
Before we are born, the cells in our bodies know how to do lots of jobs. As we grow in our mama’s belly our cells get assigned to do specific jobs like “be an eyeball” or “taste food”. After we are born, the cells in our bodies only know how to do the very specific jobs they were assigned. As a kid or an adult, if we lose part of our body, there aren’t any cells left that know how to do that job.
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