Anatomy ,Physiology, Examination of Nose
Anatomy of nose ❖ External nose ❖ Nasal cavity ❖ Accessory nasal sinuses
External nose ❖ Nasal root ❖ Nasal bridge ❖ Nasal apex ❖ Columella nasi ❖ Nasal dorsum ❖ Alae nasi ❖ Anterial nares
External nose skeleton It is a pyramidal in shape . Nasal pyramid consists of osteocartilaginous framework covered by muscles and skin. ❖ Lateral nasal cartilage ❖ Great alar cartilage ❖ Septal cartilage ❖ Frontal process of maxilla ❖ Nasal bone
Framework The framework of the external nose as seen from lateral Bones Thick upside thin downside cartilages Frontal process of the maxillary bone Nasal bone Nasal part of the frontal bone Lower lateral cartilage septal cartilage upper lateral cartilage Lesser alar cartilage
Cartilaginous part 1.Upper lateral cartilaginous 2. Lower lateral cartilages 3. Lesser alar cartilages. 4. Septal cartilage ① ② ④ ③
Features of nasal skin ❖ Thin and loose in superior part ❖ Thick and tight in inferior part ❖ Many gland ❖ Acne ❖ Rosacea ❖ Nasal furuncle ❖ Pain ❖
Features of vein in external nose ❖ No valve of vein ❖ two-way flow ❖ angular veinvena facialis anteriorcommon facial vein internal carotid vein ❖ angular vein superior， inferior ophthalmic vein cavernous sinus
Internal nasal It is divided into right and left nasal cavities by nasal septum. Each nasal cavity consists of a skin-lined portion –the vestibule, and a mucosa –lined portion, the nasal proper
Nasal cavity ❖ anterior naris ❖ posterior naris ❖ nasal septum ❖ limen nasi