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- Cloaca - Wikipedia
In the embryo, the embryonic cloaca divides into a posterior region that becomes part of the anus, and an anterior region that develops depending on sex: in males, it forms the penile urethra, while in females, it develops into the vestibule or urogenital sinus that receives the urethra and vagina [13][19] However, some placental mammals
- Cloaca: The Single Opening in Animals, Plus Human Implications
A cloaca is a single bodily opening in many animals for excretion and reproduction In rare human cases, failure to separate during development leads to complications
- Cloaca | Mammals, Birds, Reptiles | Britannica
Cloaca, (Latin: “sewer”), in vertebrates, common chamber and outlet into which the intestinal, urinary, and genital tracts open It is present in amphibians, reptiles, birds, elasmobranch fishes (such as sharks), and monotremes
- What is a Cloaca and Which Animals Have One? - Biology Insights
The cloaca is a common anatomical feature found across many vertebrate groups, indicating its ancient evolutionary origin All amphibians, such as frogs and salamanders, possess a cloaca
- Cloacal Malformations: Causes, Diagnosis Treatment
Early in development during pregnancy, the tissues that eventually become a baby’s intestinal, genital and urinary tracts are combined in one unit known as a “cloaca ”
- CLOACA Definition Meaning - Merriam-Webster
John Timmer, ArsTechnica, 17 Sep 2025 Everything comes out of one all-purpose hole called the cloaca in a chunky white paste that’s both poop and pee combined
- What is Cloaca? And Why Do Most Animals Have it Except Humans?
The non-moving collection of urine in humans is a big deal if there is a cloaca "In kids with cloacas, the problem is mostly infection from the stool into their bladder "
- Why some animals have just one hole for everything – from pooping to . . .
What is a cloaca? A cloaca is a single opening in the bodies of birds, reptiles, amphibians, elasmobranch fish (including sharks) and monotremes (platypuses and echidnas), which serves as a combined digestive, urinary and reproductive tract
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