EXTERNAL, LATERAL AND NASAL CAVITY - ANATOMY 2021
EXTERNAL NOSE AND NASAL CAVITY EXTERNAL NOSE It is a visible part of the face. SURFACE APPERANCE The external nose is compromised of pyramidal shape. The root is situated superiorly and it is continuous with the forehead. Apex - inferior. Lateral wall The lateral wall of the nose is complicated by various bones and cartilages. The bones forming the lateral wall are: Nasal, Frontal process of maxilla, Lacrimal, Conchae and labyrinth of ethmoid, Inferior nasal concha, Perpendicular plate of palatine, and Medial pterygoid plate of sphenoid The cartilages forming the lateral wall are: Upper nasal cartilage Lower nasal cartilage and 3 to 4 minor alar cartilages Blood supply of Lateral Wall 1. Anterosuperior quadrant - It is supplied by the anterior ethmoidal artery. 2. Anteroinferior quadrant - It is supplied by branches of facial and greater palatine arteries. 3. Posterosuperior quadrant - It is supplied by sphenopalatine artery. 4. Poste...