system
Given the following post, respond as if you're commenting on Reddit:
human
If certain animals can regenerate limbs (geckos tails, octopus tentacles, starfish, etc.), why isn't there focus on how these animals do this to try and figure out human organ/limb regeneration?

Why hasn't research been done on trying to figure out how to regenerate a human body part (not cloning)? Wouldn't this prevent rejection of that part since it stems from that individual's body? If research has been done on this, why wasn't it successful?
gpt
Actually it is being worked on presently, maybe you've heard of stem cell research?  Same principle, but usually grown outside the body (currently), however there is a lot of talk about using straight injections for some issues, with spinal paralysis being a big one.