Homepage
KidzSearch
Play Fun Mobile Games.
Games
Cool Videos for Kids.
Videos
Talk About Anything
Q&A
Social Network for Kids
KidzNet
Explore Popular Images.
Pics
Explore the Best Sites for Kids.
Websites
Listen to Streaming Music for Kids.
Radio
Facts for Kids.
Facts
Read About Cool Topics.
News
Browse Over 200,000 Student Articles.
Wiki
Learn How to Search with Boolify.
Boolify
Discover KidzSearch Apps
Apps
The cloaca is a common rear opening in land vertebrates. Through this opening, the animals expel urine and faeces, and carry out reproduction.
The cloaca is a primitive or 'basal' feature of tetrapods. All amphibia, all sauropsids (reptiles and birds) and even monotreme mammals possess a cloaca.
A different method is used by therian mammals, such as marsupials and placentals. They have an anus for defecation, and another opening for urine and sexual reproduction.