User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-24.115.166.160-20120929190153/@comment-198.228.201.148-20120930143825

Lizards survive the loss of tails, so Wyverns may have a similar anatomy, they're just not able to lose them at will.

As for the cuts, you never see major injuries inflicted on them in terms of breaking parts. So they don't really have to deal with many major cuts.