animals
Do All Vertebrates Have a Cloaca?
š” The Answer
- A cloaca is the rear orifice serving digestive, reproductive, and urinary tracts.
- All amphibians, reptiles, birds, cartilaginous fish, and a few mammals have it.
- Most placental mammals have separate orifices for evacuation and reproduction.
- Therefore, not all vertebrates have a cloaca.
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