|
|
Regeneration of human tissue - timeframes
Posted by:
Jose
()
Date: September 09, 2006 06:20PM Hey,
I'm not sure if people are aware of this interesting article from a little while ago that published results on the age of human cells in different parts of the body and in different organs. Very interesting and with practical implications - recommend reading it. I'm linking to a NY Times article on it which is pretty easy to read for the lay person. ..... Cells from the muscles of the ribs, taken from people in their late 30's, have an average age of 15.1 years, they say. The epithelial cells that line the surface of the gut have a rough life and are known by other methods to last only five days. Ignoring these surface cells, the average age of those in the main body of the gut is 15.9 years, Dr. Frisen found. ....... Each kind of tissue has its own turnover time, depending in part on the workload endured by its cells. The cells lining the stomach, as mentioned, last only five days. The red blood cells, bruised and battered after traveling nearly 1,000 miles through the maze of the body's circulatory system, last only 120 days or so on average before being dispatched to their graveyard in the spleen. The epidermis, or surface layer of the skin, is recycled every two weeks or so. ....... An adult human liver probably has a turnover time of 300 to 500 days, said Markus Grompe, an expert on the liver's stem cells at the Oregon Health & Science University. ...... The entire human skeleton is thought to be replaced every 10 years or so in adults, as twin construction crews of bone-dissolving and bone-rebuilding cells combine to remodel it. About the only pieces of the body that last a lifetime, on present evidence, seem to be the neurons of the cerebral cortex, the inner lens cells of the eye and perhaps the muscle cells of the heart. The inner lens cells form in the embryo and then lapse into such inertness for the rest of their owner's lifetime that they dispense altogether with their nucleus and other cellular organelles. 
All from [www.nytimes.com]. Cheers, J  Re: Regeneration of human tissue - timeframes
Posted by:
Lillianswan
()
Date: September 09, 2006 06:28PM Super fascinating! Thanks for posting this :-) The great news about this is that
Posted by:
Piano Gal
()
Date: September 10, 2006 02:00PM We get a new body almost every seven years, essentially. Change one's attitude and one's behavior and there's no reason anything cannot heal.
Love, PIano Gal Re: Regeneration of human tissue - timeframes
Posted by:
shep252
()
Date: September 10, 2006 11:50PM Very interesting to me! I am studying in the medical field. Sorry, only registered users may post in this forum.
|
|
