Does the human body rebuild its self every seven years?

Question

I thought I heard somewhere that ,through the processes of mitosis and meiosis,the human body actually rebuilds its self every seven tears.
Did I understand correctly?

Answer 1

The "every seven years" notion is popular but unproven.
When I googled it, I found most sources quoting it as fact were pushing new age, health food, or beauty products.

The first credible article I found suggests fifteen is more accurate.
This second source suggests 10 is the number, but points out some parts replace themselves more quickly. Skin has a fast "turnover" rate, for example.
Other parts, like the enamal on my teeth, seem to be wearing away without replacing themselves.

Answer 2

The body renews its structure, in a very uneven manner....you see, water is completely rechanged in average every 96 hours, bones take much longer (up to 11 years...tissues will change structures according with its rate of cell production, for example, liver cells, will change entirely in about 2,4 years, meanwhile the cells of the intestinal wall, and the outer layer of the skin, are exchanged daily.....If you take an average for all the tissues in the body, it will sum about 5.6 years....in children up to ages 7-9 years, the renewal average is shorter (because the metabolism is faster)..is about 2,9 years..
in a guy of 60 years of older, the exchange takes longer, up to 6.7 years....so, its also a matter of age and good nutrition....not an easy issue.
The seven years thing, is an urban legend....

Answer 3

We don't have the ability to regenerate nerve cells, muscle cells, or brain cells, so I imagine those atoms are kept with us for our entire lives. But then again, those cells could possibly replace their atoms and still function properly, so i guess I have no answer

Answer 4

Yes.

Answer 5

yes it does people dont really believe it i learn it in college

Answer 6

yes it does