Nematocyst

Real World Example

Imagine trying to open a tightly sealed jar when you need something inside. Just like the jar lid is holding back the contents you want, a nematocyst is a tiny capsule that holds a coiled thread inside, ready to spring into action. When activated, much like when you finally break the seal of the jar, the nematocyst's thread uncoils rapidly to capture or poison prey, illustrating how both scenarios involve a contained mechanism releasing its potential at the right moment.