system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why are my hands and ears much less resistant to the outside cold than my let's say nose or entire face for that matter?
gpt
Because they don't matter in the long scheme of things.

We can survive perfectly fine (well, the loss is very minimal) if our ears or nose are cold, or even severely damaged by the cold.

So they get very little blood circulation (bringing warmth from your core), and don't need a whole lot of protection from the elements because they aren't sending very much blood back (low bloodflow goes both ways), and thus even if they are freezing off they aren't damaging your overall survival.

Basically, in the case of surviving low temps, they aren't worth the effort/resources your body would need to stay alive.

And they aren't worth protecting long term at the cost of lowering your overall survival (like say...your legs are).