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Use "bladders" in a sentence
"Actual specific examples of front loading preadaption were mentioned in another blog - swim bladders from the lungs of lung fish for one."
"Unfortunately, large airchambers are poor insulators — gravity and any change in temperature produce convection currents inside the bladders, which is why inflatable air mattresses are fun in sun and the swimming pool, but cold camping in the mountains."
"Show of hands: How many of us find ourselves sitting at the internet for so long our bladders are about to burst, only to find our legs almost too rubbery to get us to the head?"