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Reference.org
Articular bone
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<p>The articular bone is part of the lower jaw of most <a href="/facts/Vertebrates/tT54FSTT">vertebrates</a>, including most <a href="/facts/Jawed_fish/fN7f8dKQ">jawed fish</a>, <a href="/facts/Amphibians/r2BleD2W">amphibians</a>, <a href="/facts/Birds/RJF6zwLP">birds</a> and various kinds of <a href="/facts/Reptiles/04n1uKf1">reptiles</a>, as well as ancestral <a href="/facts/Mammal/phSwTzBo">mammals</a>. </p>