Blood supply of the nose

-The blood supply to the nose is divided according to blood supply to the:A) Nasal septumB) Lateral nasal wall

- The blood supply of the nose is extensively arising from the external and internal carotid system.

- A) Nasal septum

Anterior ethmoidal artery

Posterior ethmoidal artery

Septal branch of superior labial aretry

Septal branch of greater palatine artery

Splenopalatine artery

Little`s Area

From the Internal Carotid System From the External Carotid System( through maxillary and facial artery)

Anterior and posterior ethmoidal artery*They are branches of opthalmic artery of ICA

1) Septal branch of superior labial artery* They arise from facial artery which arise from ECA2) Septal branch of greater palatine artery* They arise from maxillary artery which arise from ECA3) Splenopalatine artery* They arise from branches of maxillary artery

Little`s Area Mneumonics (LEGS)L - superior Labial arteryE - anterior Ethmoidal arteryG - Greater palatine arteryS - Sphenopalatine artery

- B) Lateral Wall of Nasal Cavity

Liitle`s areaAnteroinferior part of the nasal septum just above

the vestibule. It is the area where 4 arteries anostomose to form a vascular plexus called

Kiesselbach`s plexus. It is exposed to drying effect of inspiratory current and finger nail trauma, usual

site for epistaxis for young children and adult

Branches of splenopalatine artery

Greater palatine artery

Facial artery

From the Internal Carotid System From the External Carotid System( through maxillary and facial artery)

Anterior and posterior ethmoidal artery*They are branches of opthalmic artery of ICA

1) Posterior lateral nasal branches(From sphenopalatine artery)2. Greater palatine artery → From maxillary artery3. Nasal branch of anterior superior dental→ From infraorbital branch of maxillary artery4. Branches of facial artery to nasal vestibule