Mouth  

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Mouth close-up from the film The Big Swallow (1901)
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Mouth close-up from the film The Big Swallow (1901)

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Train wreck at Montparnasse (October 22, 1895) by Studio Lévy and Sons.
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Train wreck at Montparnasse (October 22, 1895) by Studio Lévy and Sons.

In animal anatomy, the mouth is the first portion of the alimentary canal that receives food.

Some animal phyla, including vertebrates, have a complete digestive system, with a mouth at one end and an anus at the other. Which end forms first in ontogeny is a criterion used to classify animals into protostome and deuterostome. The first space of the mouth is the mouth cavity, bounded laterally and in front by the alveolar arches (containing the teeth), and posteriorly by the isthmus of the fauces.

In human anatomy

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Unless indicated otherwise, the text in this article is either based on Wikipedia article "Mouth" or another language Wikipedia page thereof used under the terms of the GNU Free Documentation License; or on original research by Jahsonic and friends. See Art and Popular Culture's copyright notice.

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