<P> In animal anatomy , a cloaca / kloʊˈeɪkə / kloh - AY - kə ( plural cloacae / kloʊˈeɪsi / kloh - AY - see or / kloʊˈeɪki / kloh - AY - kee ) is the posterior orifice that serves as the only opening for the digestive , reproductive , and urinary tracts ( if present ) of certain animals , opening at the vent . All amphibians , birds , reptiles , and a few mammals ( monotremes , tenrecs , golden moles , and marsupial moles ) have this orifice , from which they excrete both urine and feces ; this is in contrast to most placental mammals , which have two or three separate orifices for evacuation . Excretory systems with analogous purpose in certain invertebrates are also sometimes referred to as cloacae . </P>
<P> In animal anatomy , a cloaca / kloʊˈeɪkə / kloh - AY - kə ( plural cloacae / kloʊˈeɪsi / kloh - AY - see or / kloʊˈeɪki / kloh - AY - kee ) is the posterior orifice that serves as the only opening for the digestive , reproductive , and urinary tracts ( if present ) of certain animals , opening at the vent . All amphibians , birds , reptiles , and a few mammals ( monotremes , tenrecs , golden moles , and marsupial moles ) have this orifice , from which they excrete both urine and feces ; this is in contrast to most placental mammals , which have two or three separate orifices for evacuation . Excretory systems with analogous purpose in certain invertebrates are also sometimes referred to as cloacae . </P>
what body system is the cloaca part of
what body system is the cloaca part of
animal anatomy
animal anatomy