The outermost layer of your skin is entirely replaced about every two to four weeks.
Fact #10803
More Human Body Facts
The human body produces red blood cells in bone marrow.
Fact #202 · Human Body
Your heart creates enough pressure to squirt blood several feet.
Fact #2623 · Human Body
Your brain can recognize a familiar face in less than half a second.
Fact #2674 · Human Body
Your liver can regenerate itself from as little as 25% of its original tissue.
Fact #3494 · Human Body
Your body replaces cells constantly.
Fact #2365 · Human Body
The human nose can distinguish over one trillion different scents.
Fact #3508 · Human Body
More than half of all humans ever lived died before age 10.
Fact #3089 · Human Body
Stress hormones prepare the body for a fight-or-flight response.
Fact #959 · Human Body
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