Translations:Gastrointestinal tract/35/en
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Other animals
In most vertebrates, including fishes, amphibians, birds, reptiles, and egg-laying mammals, the gastrointestinal tract ends in a cloaca and not an anus. In the cloaca, the urinary system is fused with the genito-anal pore. Therians (all mammals that do not lay eggs, including humans) possess separate anal and uro-genital openings. The females of the subgroup placentalia have even separate urinary and genital openings.