Cockroaches are famous for their tenacity and are often believed as the most likely creature that will survivor a nuclear war. They can live without their heads,
A bee might be dead it can still sting you,
Chickens can run around with their heads cut off.
An octopus after being chopped up continues to move, the reason octopuses arms maintain mobility even after being chopped off.
Salamanders have the uncanny ability to regenerate any part of their body that has been chopped off.
It has been discovered that frogs continue to move around even when their brain is dead.
Flies can survive freezing temperatures and go into suspended animation. You can freeze them for days after giving them some heat they will be back as normal.
Their heart is cut off from the oxygen and nutrients, usually supplied by the blood is just very normal. They die for a very long time, for 5000 hours in the case of the loggerhead musk turtle.
Snakes can still kill you with their head chopped off, the snake’s head has its fangs and deadly poison sacs still have the ability to bite you even if it’s no longer attached to the body.
Flatworms are known as masters of regeneration they can rebuild any part of their bodies after amputation.