cloaca
Three-in-one exit
A cloaca is a single opening in birds, reptiles, amphibians, and some fish that serves as the exit for the digestive, urinary, and reproductive systems.
Unlike mammals, which have separate openings for these functions, these animals expel waste and eggs or sperm through one chamber.
The term comes from Latin for sewer, and in ancient Rome referred to the drainage system beneath the city.
Opening for airflow
- orificeBodily passage entrance
- sphincterMuscle encircling body opening
- rectumTerminal intestinal chamber
- anusPosterior digestive opening
urogenital · digestive · reproductive · pelvic · abdominal · perineal · intestinal · chamber
Solid digestive waste
- urineRenal excretion fluid
- droppingsAnimal excrement deposits
- guanoAccumulated bird droppings
- defecationExpulsion of feces
urination · voiding · elimination · evacuation · waste · excreta · scat · ejecta
Of or concerning birds
- reptilianOf snakes and lizards
- amphibianDual-habitat cold-blooded vertebrate
- monotremeEgg-laying mammal
- birdFeathered flying vertebrate
reptile · fish · marsupial · egg-laying · ornithology · herpetology · platypus · echidna
Underground drainage pipe
- RomanOf ancient Italy's capital
- drainageLiquid removal system
- TiberCentral Italian river
- undergroundBelow ground or countercultural
ancient · aqueduct · infrastructure · sanitation · engineering · subterranean · channel · Tarquin
vent
Opening for airflow
- orificeBodily passage entrance
- sphincterMuscle encircling body opening
- rectumTerminal intestinal chamber
anus · urogenital · digestive · reproductive · pelvic · abdominal · perineal · intestinal · chamber · opening
feces
Solid digestive waste
defecation · urination · voiding · elimination · evacuation · waste · excreta · scat · ejecta · discharge
avian
Of or concerning birds
- reptilianOf snakes and lizards
- amphibianDual-habitat cold-blooded vertebrate
- monotremeEgg-laying mammal
bird · reptile · fish · marsupial · egg-laying · ornithology · herpetology · platypus · echidna · lizard
sewer
Underground drainage pipe
underground · ancient · aqueduct · infrastructure · sanitation · engineering · subterranean · channel · Tarquin · Forum
sewage
Liquid refuse in drains
- effluentDischarged liquid waste
- wastewaterContaminated drainage from buildings
- drainageLiquid removal system
sludge · overflow · pollution · treatment · outfall · discharge · pipes · municipal · sanitary · stormwater
- animal anatomyskull, teeth, ears, eyes, nose
- animal partsappendage, forelimb, hind leg, hind legs, hindlegs
- bird anatomybeak, feathers, wings, tail feathers, wing feathers
- reproductive organsovary, ovaries, testis, testes, testicle
- reptile anatomyskeleton, bones, lungs, skull, ribs
- Roman ArchitectureColosseum, Pantheon, forum, aqueduct, amphitheater