The Digestive System

Up Head Digestive tract Digestive Glands Large Animal

Oral Cavity Canine Teeth Equine Teeth

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I apologize that the skull is facing the wrong direction, but if I flip the image, all the tags will be written backwards. Are these brachydont or hypsodont teeth? The 4th premolar on the upper arcade and the 1st molar on the lower arcade have a special name and function - what is the name and function?