If the cells in our bodies constantly replace themselves, how come God didn't work out that it might be more beneficial if our joints could replace themselves as whole units instead of as individual cells? My knees and ankles could certainly use a reboot.

Didge, my friend, you know I love you and I love my God. :0)

I want to give you a serious answer..... Or at least take my best shot at it. I think He designed our bodies to age, to grow old. Now I know some of your testimony. You are a triathlete. My uneducated "educated" guess would be that your knees, ankles and joints feel the effects of the many years of putting stress on those body parts. :0)

I think we should establish a blood bank with young peoples blood so we could get transfusions of uncontaminated cells to replace our worn out cells. We could pressgang them if there weren't enough volunteers.

Probably because the mortals who invented God couldn't imagine it.

Didge u and me both need a reboot but we are made to fall apart and die like a old car

Your cells replicate X amount of times, then they do not.

Depending upon your genetics, your joints might succumb that much sooner then someone else's . . .

Of course none of this was information readily available to those creating the stories of Gods/God so we are left with blanketed statements such as "God is Good".  This is so that believers can "Pray away" their aches and pains.

Last fall I had minor surgery to fix a torn meniscus in my left knee.  They cut out the ripped part which the joint never grows back again . .  So I get where you are coming from Digde.

I guess he just wanted us to cherish them and feel blessed and thank him when we saw someone who doesn't have them,you know it's like not everybody can have gold or diamond.. So yeah,,that's why!

We are rather shoddily designed.  The knee and the back are certainly not well engineered.  He gave dolphins better designed eyes than he gave us.  The appendix, really?  The samne for my prostrate. 

That's an easy one.

god is a particle not a person.

It's part of the ordeals of his plan. If I got it right, aging and whatnot are supposed to be part of the test to determine whether you're worthy to go to heaven (sorry if I got it wrong)