While gardening a Texas man decapitates a rattlesnake with a shovel. But after several minutes when he bent down to dispose of it. He received a nasty surprise.
The severed head nit him and the man required 26 doses of antivenom.
cold-blooded animals like snake and aquatic animals rely on outside sources for body warmth. They don’t use energy and oxygen to generate body heat. This is the reason why they able to survive without oxygen for a long period of time.
That’s how the rattlesnake head continues to function, including the venom glands, for a long time afterward.