If the cells in our body are replaced every 7 to 10 years, why cant it roll itself back into a position where it worked better than it does now?

Question

For example: Someone has a disease, why cant the body just reset itself to how it was before it had the disease to get rid of the negative effects?

In: Biology

Answer 1

The cells don’t all magically regenerate when you hit the 10 year mark. That’s just the estimated time it would take your body to replace all of your current cells. Which happen to be replaced on a regular basis. When you get sick your body does try to speed up this process. That’s one of the reasons why you get a fever, to target the cells that are harming your current ones and to replace the ones that’ve died or are dying currently. At least that’s how I understand the process. Hope this helps!