sentence: Some species have large cloacal cavities that are lined with many finger-like projections.
sentences_before: Aquatic respiration in Australian freshwater turtles is being studied.
sentences_after: These projections, called papillae, have a rich blood supply, and increase the surface area. The turtles can take up dissolved oxygen from the water using these papillae, in much the same way that fish use gills to respire.
concept_name: specie
headings: Turtle Ecology and life history
categories: Living fossils