From the ArcaMax Publishing, Trivia Newsletter:
http://www.arcamax.com/news/trivia/s-236033-726029

How long does a red blood cell live?

Each red blood cell lives an average of 4 months and travels between the lungs and other tissues 75,000 times before returning to the bone marrow to die.

This news arrived on: 09/17/2007

---

Copyright © 2009 ArcaMax Publishing, Inc., and its licensors. All rights reserved.