The Physical Characteristics of Humans

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The human throat has been modified to facilitate speech. We have a resonating chamber for vocal sounds about an inch and a half in length above the larynx. The range of sounds that the human vocal apparatus is able to produce is truly amazing and ranges from animal-like growls, hoots, and screeches to the perfect pitch of an opera singer. 

Adaptation of the human throat for speech also permits choking while eating or drinking — a danger other creatures do not have to fear.