Studies of a nematode parasite in the air bladder of the eel.
Users pump air into the air bladder to prime the blaster.
Air bladder construction varies from a simple polyethylene bag to internally baffled, multiple chambers of latex (vulcanized rubber) or vinyl with bonded cotton exteriors.
This air bladder has access to free air outside the bag.
In its primitive form, the air bladder was open to the alimentary canal, a condition called physostome and still found in many fish.
Stomp rockets have an air bladder that attaches to the rocket by a flex tube.
When the mine experiences sudden overpressure an air bladder inflates caused by the differential in pressure between the upper and lower sections, this prevents the activation of the mine.
Considering the filter action, a better and more exact analogy is the hydraulic accumulator pressure tank, as described, but with a closed, pressurized air bladder and only one water connection.