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Q.
Which of the following is a single $U$ shaped bone, present
at the base of the buccal cavity and it is also included in
the skull?
Locomotion and Movement
Solution:
Hyoid is a horseshoe-shaped (or U shaped) bone
situated in the anterior midline of the neck between the
chin and the thyroid cartilage. At rest, it lies at the level of
the base of the mandible in the front and the third cervical
vertebra $(C_3)$ behind. The hyoid bone provides attachment
to the muscles of the floor of the mouth and the tongue
above, the larynx below, and the epiglottis and pharynx
behind. The hyoid bone helps in tongue movement and
swallowing.