1. Anatomy
of the Nose

2. External Nose- Bony

3. External Nose- Cartilaginous

4. Dangerous area of the face
Dangerous area of the nasal cavity

5. Nasal cavity Medial wall (Septum) Lateral wall Roof Floor Respiratory
Olfactory
Vestibule
Anterior nares (nostrils)
Posterior nares (choanae)

6. Vestibule

7. Nasal septum Bony Cartilaginous Membranous
Perpendicular plate of ethmoid
Perpendicular plate of Vomer
Nasal crest of maxilla
Nasal crest of palatine bone
Rostrum of sphenoid
Cartilaginous
Quadrilateral cartilage
Membranous
Forms the columella

10. Lateral wall of nasal cavity

12. Ostio-meatal Complex (OMC)

13. Mucosa Respiratory area Olfactory area Vestibule
Pseudo stratified ciliated columnar epithelium
Mucous glands and goblet cells
Olfactory area
Vestibule
Skin
Turbinates: Vasular with submucosal sinusoids (Cavernous tissue)

14. Blood supply

16. Little’s area
Caudal part of the nasal septum which has a rich submucosal arterial network: Septal branches of
Anterior ethmoidal
Sphenopalatine
Greater palatine
Superior labial
Prone for drying effect of inspired air and to microtrauma due to picking of the nose
Commonest cause and site of epistaxis in children
DD: Bleeding from retrocolumellar vein

17. Sphenopalatine artery is considered as THE artery of epistaxis

18. Nerve supply Maxillary N Anterior ethmoidal N Olfactory
Sphenopalatine
Lesser and greater palatine
Anterior ethmoidal N
Olfactory
Autonomic- Vidian N

19. Lymphatic drainage Anterior part Posterior part
Submandibular lymph nodes
Posterior part
Retropharyngeal lymph nodes
Jugulo-digastric lymph nodes

20. Thank you