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.
If there is/are cell(s) absent in any part of the body, mitosis occurs to replace the missing cell(s). So basically, if an organism is able to keep all its cells from being harmed in any way, mitosis will never be required as no cell will need replacement. Cells undergo meiosis to form gametes (sex cells).