n. pl. clo-a-cae

1. a cavity in the pelvic region of most vertebrates, except higher mammals, and certain invertebrates, into which the alimentary canal and the genital and urinary ducts open
2. a sewer

The cloaca is the only posterior opening on sugar gliders of either sex that serves the intestinal, urinary and reproductive systems.

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Last Edited March 30, 2013