Anatomy

The nasopharynx serves as a conduit for air, nasal and paranasal sinus secretion, and is lined by squamous, respiratory and transitional epithelium. It lies above the level of the soft palate and posterior to the choanae (Fig. 20.16). The lateral wall consists of the Eustachian tube opening, the lateral

Nasopharynx

Larynx

Hypopharynx

Choanae

Nasal septum

Torus tubarius

Opening of auditory (Eustachian) tube

Fossa of Rosenm├╝ller

Epiglottis Vocal cord Aryepiglottic fold Cuneiform tubercle

Comiculate tubercle (arytenoid)

Pyriform fossa Postcricoid area

Trachea

Soft palate Uvula

Palatine tonsil Base of tongue

Figure 20.16. Anatomical sites of the nasopharynx, oropharynx, hypopharynx and larynx.

Soft palate Uvula

Palatine tonsil Base of tongue

Oropharynx

Esophagus

Figure 20.16. Anatomical sites of the nasopharynx, oropharynx, hypopharynx and larynx.

pharyngeal recess (fossa of Rosenmuller) and the cartilaginous medial end of the Eustachian tube (torus tubarius). The fossa of Rosenmuller is a cleft-like pouch lined by the pharyngobasilar fascia and it extends to the parapharyngeal space within which runs the internal carotid artery, internal jugular vein, cranial nerves IX-XII and the sympathetic nerve (Fig. 20.17).

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