Assertion: monotreme's body | /r/ObjectUse | used for excretion
Facets:
Source sentences:
text: The name Monotremata means “one-holed,” in reference to the fact that both sexes have only one opening at the rear of the body, which is used for both reproduction and excretion.
text: This refers to the fact that, like reptiles and birds, both sexes have only one opening at the rear of the body, which is used for both reproduction and excretion.