1. How often do cells die?

2. Red blood cells Have a lifespan of ~120 days
Transport nutrients around your body

3. Skin cells You lose ~1 million dead skin cells per day
Most of those cells are found in the dusty areas of your home!

4. White blood cells Help fight off infections
Last in the bloodstream for ~3-6 hours

5. Stomach
The cells that line your stomach have a life span of ~2 days

6. skeleton
Skeletal cells (osteocytes) have the one of longest cellular life spans.
In general, an adult skeleton is replaced every 10 years.

7. In your journal… If cells are constantly dying, why don’t we run out?
Write your answer in your journal.