Eli5 how some lizards drop their tails at will without blood loss. What happens biologically to enable this?

Question

I’ve googled but the mechanism of the detachment is unclear.

In: 3

Answer 1

Some lizards, like leopard geckos, store fat in their tails and won’t drop them unless they have to. Others, like crested geckos, can drop them out of fear. A thunderstorm is apparently enough because we’ve just found their tails just sitting there.