Bladder-like traps can be found in some insectivorous
plants that grow aquatic or on wet soils. In Utricularia
– Bladderwort, these are specialized leaves
which form few millimetres large vesicular locules in which a negative pressure is produced. When activated, trigger hairs
open and close the lid of the bladder-like trap abruptly. Thereby, the negative pressure sucks the prey into the bladder. The prey is subsequently digested enzymatically.