Understanding The Laryngopharynx: Pathways For Food And Air

Understanding The Laryngopharynx: Pathways For Food And Air

Question 1. Nasopharynx (or) Boundaries and structures related to nasopharynx

Answer:

• Nasopharynx is the nasal part of pharynx

Nasopharynx Boundaries:

• Anterior wall-nasal conchae
• Posterior wall – free margin of soft palate
• Lateral wall – palato- pharyngeal arch
• Roof – body of sphenoid, basiocciput, anterior arch of atlas
• Floor – pharyngeal isthmus

Nasopharynx Relations:

Nasopharynx Nerve supply:

• It is supplied by pharyngeal branches of pterygopalatine ganglion

Nasopharynx Function:

• Passage of air

Question 2. Muscles of pharynx
Answer:

Question 3. Laryngopharynx
Answer:

• It is laryngeal part of pharynx

Laryngopharynx Relations:

Laryngopharynx Anteriorly:

• Inlet of larynx
• Posterior surface of cricoid cartilage Arytenoid cartilage

Posteriorly:

• C4 &C5 vertebrae

Laterally:

• Piriform fossa

Laryngopharynx Nerve supply:

• Supplied by IX & X cranial nerves

Laryngopharynx Applied aspect:

• Removal of foreign bodies from piriform fossa may damage internal laryngeal nerve causing anaesthesia of supraglottic part of larynx