The Study was conducted by the Sloan Center on Aging & Work at Boston College between November 2007 and September 2008 (Time 1: November 2007 to March 2008; Time 2: May 2008 to September 2008). The Center collaborated with 9 U.S. workplaces (12 departments) on this study.
Heart muscle cells can take approximately 20 years to completely renew themselves. Never Cells that cannot repair â Itâs unfortunate for many, but old age can take itâs toll on the eyes and brain.
On average a properly nourished human body will produce (roughly) 20,000 red blood cells a second, so 1,200,000 a minute and 72 million an hour, taking into account that in one pint there will be trillions of red blood cells, and the body also has to replace red blood cells as they die it will probably take a few days to replace the whole pint, i gave blood yesterday and the guidelines for donating again is not for 3/4 months however i highly doubt it takes any more than 2 weeks to replace ...