Its a matter of turnover. Your skin does many things but its main action is a "simple" mechanical barrier to the outside world. So unlike, for example, a liver cell which is producing many proteins and enzymes, a skin cell on the outer epidermal layer just has to sit tight and act tough against whatever comes in contact with it. Throughout the day that will be your clothes, soap, bacteria etc. Inevitably therefore your cells would get damaged incredibly frequently. So the surface of your skin actually consists of dead cells which can be easily rubbed off throughout the day thus preventing damage to the more sensitive bits underneath. So why is the lifetime of a skin cell so short?, because that way we dont end up with constant sores and damage all around our body.
Skin cells last 2 - 4 weeks depending on how fast/often you shed skin cells.
28 days. 2days
it is so short because it wants to be
Skin cells have a life span of 2-4 weeks.
20 days
Skin Cells they die each hour and new ones will replace them.
a
Yes, after its life span ends.
all cells will eventually die. each day a you lose a thin layer of skin and grow it back. and you lose about 100 or more pieces of hair each day
Progeria
all cells have a lifespan of 90 days
for children about 50 days but for adults about 100 days
Red blood cells don't have nuliets however white blood cells do. Red blood cells can have an average life-span of 120 days while white blood cells do not have an average life span. Also, white blood cells are larger than red blood cells.
Avg. lifespan for an adipocyte is 8.5 years.
nucleus
mature naive bcell
about 100-120 days