Drainage of Paranasal Sinuses Flashcards
What are the paranasal sinuses lined with and what do the cells there secrete?
- Mucosa
- Mucus
What does flushing of paranasal sinuses into the nasal cavity do?
Remove any particles that are not meant to be there
What are the 4 paranasal sinuses?
- Frontal sinus
- Ethmoidal air cells
- Maxillary sinus
- Sphenoidal sinus
Why are ethmoidal air cells not true sinuses?
They have multiple openings
Where does the sphenoidal sinus drain into?
Spheno-ethmoidal recess
Where do the posterior ethmoidal air cells drain into?
Superior meatus
Where do the middle ethmoidal air cells drain?
Middle meatus
Where do the anterior ethmoidal air cells drain?
Middle meatus
Where do the maxillary sinuses drain?
Middle meatus (through hiatus semilunaris)
Where do the frontal sinuses drain?
Middle meatus (through hiatus semilunaris)
Where does the nasolacrimal duct drain?
Inferior meatus
