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Butt-Breathing" (Cloacal Respiration)Many freshwater turtles have a biological superpower called cloacal respiration, famously known as "butt-breathing".How it works: The cloaca is a versatile, multi-purpose opening at the base of the tail used for waste and reproduction. Some turtles have densely vascularized sacs inside called bursae. When submerged, they can pump water in and out of these areas, absorbing dissolved oxygen from the water directly into their bloodstream.
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