In a Human body, cells like blood cells and skin cells keep on dividing to replace the dead cells. Then why are doctors worried about the head injury?

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Solution

In the human body head is the main function unit.when an head injury occurs doctors are worried that the functional system of the brain doesn't get damage. even if the cells get replaced the wound will affect the functions of the brain

Brain mostly has nerve cells and nerve cells don't divide and produce new cells like the blood cells or the skin cells so they tell that a damage caused in the head is a permanent damage most of the times

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