Question

the component in human beings that doesn't not change with their age is​

Answer 1

there are 3 component in our body

the component in human beings that does not change with there age is blood

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Answer 2

Interestingly  the only part of the body that does not grow after birth is the innermost ear ossicle - Stapes  which is attached to the oval window of the cochlea. Its size is about 3 mm at birth and doesn’t change in size as we grow