pharynx, that enables us to make complex sounds necessary for speech. The human pharynx forms in our early childhood, when the larynx migrates lower in the throat, making it impossible for humans to breathe and swallow at the same time. Even the ability to walk and run upright is a special characteristic that only humans can do. Secondary characteristics include the development of tools, self-awareness and the development of sophisticated speech. Our self-awareness, in turn, results in the development…
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