ANATOMY AND FUNCTION OF PHARYNX IN DETAIL

Details of pharynx including anatomy and functions

1. PHARYNX Seminar presented by : Dr Rati Goyal

2. Introduction - Fibromuscular tube lined with mucus membrane. Iength:12 -14 cm Width: 3.5 cm at its base & 1.5 cm at pharyngoesophageal junction

3. Location and boundaries -

4. Parts of the pharynx Nasopharynx Oropharynx Laryngopharynx

5. Nasopharynx

6. Features Passavant’s ridge Nasopharyngeal Tonsil Orifice of pharyngotympanic tube or Auditory tube Tubal elevation and Tubal Tonsil 2 mucosal folds – Salpingopharyngeal fold Salpingopalatine fold

7. CLINICAL CORRELATION ADENOIDS: Enlargement of nasopharyngeal tonsils due to infection High-arched palate Crowded teeth Short upper lip Mouth breathing

8. Oropharynx Extent – From lower surface of soft palate to the upper border of epiglottis.

9. Oropharynx Features – - Oropharyngeal isthmus - Palatine tonsils - Lingual tonsils

10. Waldeyer’s lymphatic ring – Right and left: palatine tonsils nasopharyngeal tonsils tubal tonsils lingual tonsils

11. Laryngopharynx

12. Structure of pharynx Consist of 5 layers from within outwards- Mucosa Submucosa Pharyngobasilar fascia Muscular coat Buccopharyngeal fascia

13. Pharyngobasilar fascia

14. Muscular coat 2 layers of striated muscles. The outer layer of 3 pairs of circular muscles (constrictor muscles ): Superior constrictor Middle constrictor Inferior constrictor The inner layer of 3 pairs of longitudinal muscles: Stylopharyngeus Salpingopharyngeus palatopharyngeus

15. Constrictor muscles

16. longitudinal muscles

17. Gaps in pharyngeal wall

18. Nerve supply of pharynx

19. Arterial supply of pharynx

20. Venous and lymphatic drainage of pharynx

21. Applied anatomy Killian’s dehiscence

22. THANKING YOU ……