face, nasal

Nasal cavity – sinuses

  • Sphenoidal sinus
    • opens into the sphenoethmoidal recess superior to the superior nasal conchae
  • Frontal sinus
    • infundibulum connects to anterior portion of semilunar hiatus in the middle nasal meatus
  • Maxillary sinus
    • largest opening into the semilunar hiatus in the middle nasal meatus
  • Ethmoidal air cells
    • anterior cells open onto infundibulum of frontal sinus and flow into the semilunar hiatus in the middle nasal meatus
    • middle cells drain via many small openings onto the ethmoidal bulla within the middle nasal meatus
    • posterior cells open into the superior nasal meatus
  • Nasolacrimal sac
    • drains lacrimal secretions from eye into inferior nasal meatus

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