Location of pyriform fossa
Pyriform fossa lies between quadrate membrane and medial side of thyroid cailage. It is transversed by internal laryngeal nerve.The pyriform fossa is separated from vallecula by lateral folds of the tongue. Ref: BD Chaurasia's HUMAN ANATOMY, Volume 3.
Nasopharynx
Oropharynx
Laryngeal pa of pharynx
None
Head and neck