gotopogo wrote:If every cell in the human body was immortal then how would the human die?
gotopogo wrote:so immortality wise.....i should just give up and let people who are say over 16 do it?
BioWizard wrote:gotopogo wrote:If every cell in the human body was immortal then how would the human die?
That's exactly what cancer is. Cells that don't die, which end up taking over the body. It's harder to maintain cells in good health for very long period of time than it is to destroy them and make new fresh ones. So by turning over cells (killing old ones and replenishing them with new ones), the body keeps tissues healthy and minimizes accumulation of cellular damage (from oxidative stress, toxins, radiation, etc). Additionally, processes such as wound healing and immune response are built on cell death and require it to occur for them to progress properly. Without cell death, the body will have an endless number of problems, including failure to properly defend, heal, and repair itself, which will be completely counterproductive to the goal of extending lifespan.
We age and lose health over time not because our cells die - cell death is a good thing as we've established. We age and lose health because our body gradually loses its ability to replace old/dying/dead cells with new vital ones, and that is what we need to focus on for increasing lifespan and improving health. Making all cells immortal will simply keep the rubbish around and accumulate old damaged tired cells, which if anything, will shorten lifespan.
Think about it this way. You can extend the lifetime of a machine by continuously replacing any old/damaged parts with new ones. If you make all parts irreplaceable (immortal), the parts will accumulate damage and the machine will break down and become dysfunctional as a whole much faster.
gotopogo wrote:as in cells have to die or people have to die?death is necessary for life
Paralith wrote:I personally think this is less important for humans, because we're smart critters that can change our environment to suit our needs. And some day soon we'll be smart enough to change our genes by ourselves if that's what we need to do. Well, that's what I believe, I know Bio doesn't. (Sorry boss, not trying to start that old argument. :))
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