QS Study

The lateral wall of the nose is partly bony and partly cartilaginous and small amount of soft tissue. It is a region of the nasopharynx essential for humidifying and filtering the air we breathe in nasally. It is the medial wall of the maxillary sinus.

Formation:

(A) The bony part: is formed from before backward by –

  1. Nasal bone.
  2. Frontal process of the maxilla.
  3. Lacrimal bone.
  4. Labyrinth of ethmoid with superior and middle conchae
  5. Inferior nasal concha.
  6. Perpendicular plate of the Palatine.
  7. Medial pterygoid plate.

(B) Cartilaginous part: formed by –

  1. The upper nasal cartilage.
  2. The lower nasal cartilage.
  3. 3 or 4 small alar cartilage.

(C) Cuticular part: Formed by fibrofatty tissue covered with skin.

Formation of Lateral Wall of Nose 1

Fig: Formation of Lateral Wall of Nose

Lateral Wall of Nose divide the nasal cavity into four passages that have openings to the paranasal sinuses:

(1) The sphenoethmoid recess lies posterior to the superior concha and has the opening for the sphenoidal sinus.

(2) The superior nasal meatus lies between the superior and middle conchae and has openings to the posterior ethmoidal sinuses.

(3) The middle nasal meatus is longer and deeper than the superior nasal meatus. The middle and anterior ethmoidal sinuses drain into the middle nasal meatus.

(4) The inferior nasal meatus is found below the inferior nasal concha. The nasolacrimal duct opens into this meatus.

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