Stem cells: The secret to change

Unusual, versatile cells hold the key to regrowing lost tissues

By Alison Pearce Stevens, 16:22 PM April 10, 2013

Inside your body, red blood cells are constantly on the move. They deliver oxygen to every tissue in every part of your body. These blood cells also cart away waste. So their work is crucial to your survival. But all that squeezing through tiny vessels is tough on red blood cells. That’s why they last only about four months.

Where do their replacements come from? Stem cells.

These are a very special family of cells. When most other cells divide, the daughter cells look and act exactly like thei...

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