Why do we become more frail when we are older?

Question: Why do we become more frail when we are older?
- Keywords:
  age,
  frail,
  old
Asked by meg123 to Amy, Karen, Sarah, Vijay, Will on 19 Jun 2012. This question was also asked by thewackyscientist.
- Karen Reed answered on 19 Jun 2012:
  
  Hi Meg – my answer for this question is linked with my answer for why we die at different times. We get frial becuase things just stop working properly as we get old – we struggle to make more cells and everything going on in us just runs out of steam and can’t work.

Question: Why do we become more frail when we are older?