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Hiltons sac --> saccule of larynx

a small diverticulum provided with mucous glands extending upward from the ventricle of the larynx between the vestibular fold and the lamina of the thyroid cartilage; it is a vestigial structure, being a much larger structure interdigitating with the neck musculature in some of the great apes where it serves as a resonating chamber.

Synonym: sacculus laryngis, appendix ventriculi laryngis, hiltons sac, laryngeal pouch.

Origin: L. Sacculus