Different Cells are Replaced at Different Rates

Different types of cells have different lifespans, e.g.:�

we shed our�skin cells about every 35 days

red�blood cells live about 120 days,�platelets 6 days�and�white cells less than a day

most of the adult�skeleton is replaced about every 10 years

the average age of a�fat cell�seems to be about�10 years

a�25-year-old heart replaces about 1% of all its cardiomyocytes�(heart muscle cells�)�over the course of a year, while a 75-year-old heart replaces about half a percent

our�neocortical neurons, the cell type that mediates much of our cognition,�are produced prenatally and retained for our entire lifespan

Notes:

Neural cells are not replaced at all.

Folksonomies: biology physiology

Taxonomies:
/health and fitness/disease (0.648954)
/health and fitness/aging (0.595075)
/health and fitness/disease/heart disease (0.387378)

Keywords:
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Entities:
10 years:Quantity (0.010000 (neutral:0.000000)), 120 days:Quantity (0.010000 (neutral:0.000000)), 25-year:Quantity (0.010000 (neutral:0.000000)), 35 days:Quantity (0.010000 (neutral:0.000000)), 75-year:Quantity (0.010000 (neutral:0.000000)), 6 days:Quantity (0.010000 (neutral:0.000000)), 1%:Quantity (0.010000 (neutral:0.000000))

Triples

21 MAY 2013

Not All Cells are Replaced in a Human Body

You Are Not the Same Person You Were as a Child > Contrast > Different Cells are Replaced at Different Rates
Our brain cells are with us for life, contradicting the claim that we are completely replaced every so many years.

Folksonomies: biology contradiction human physiology