Hyoid bone

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The hyoid bone, also known as the lingual bone, is located at the base of the tongue, just above the larynx. It has the unique distinction of not being connected to any other bone in the human skeletal system. However, it is connected to the different muscles of the jaw, tongue, larynx, and pharynx. In this way it plays a role in the process of swallowing and vocal expression. In humans, the hyoid bone is made up of several separate units.