How do lizards cut their own tail without bleeding to death ?

Lizards usually lose their tails to throw off predators who are after it . This is a defence mechanism .


These tails are made of bony vertebrae . Hence it will not bleed .

When the tail detaches itself , the nervous spasms make this dropped tail to wag around as if it is alive . This startles the enemy and gives precious seconds to lizard to escape .

The tail will regenerate itself , but the process requires lot of energy .