ANAT2111 Lecture Notes - Lecture 19: Nasal Concha, Inferior Nasal Concha, Nasal Septum

• School: UNSW, UNSW Sydney
• Department: Anatomy
• Course: ANAT2111
• Professor: Dr Lawrence Wade

Document Summary

Filters, warms, moistens & cleans inspired air. Plates of hyaline cartilage form nostrils and apex (attach to nose + maxilla). Nasal cavity is divided in the midline by the nasal septum. Nasal concha three bony shelves that extend as scrolls. The rest is respiratory epithelium region (continuous with epithelium in respiratory tract). As air is inhaled into the nasal cavity, it rushes over the highly vascular mucosa of the conchae. This allows air to be warmed and humidified. Coarse hairs in nostrils + ciliated mucosa trap particles in air. Covered in olfactory mucosa traps odour particles triggers olfactory nerves for smell. The remainder is covered in respiratory epithelium. Olfactory bulb sits on anterior cranial fossa above nasal cavity roof. Olfactory nerves pass through the ethmoid bone (foramina of cribriform plate) to the olfactory bulb. Lateral anterior (frontal, nasal, maxilla) + posterior (sphenoid, palatine) Concha formed from very thin plates of bone.