Lecture 28 Flashcards
Nose - External Features
- free tip
- root
- external nares (nostrils)
- ala
The external nares are separated by
septum
- anterior, cartilaginous part
- posterior, bony part
What does the posterior, bony part of the septum consist of?
- vomer
- perpendicular plate of ethmoid bone
- perpendicular plate of palatine bone
- anterior nasal spine of maxillary bone
Bony framework of nose includes
- nasal bones
- frontal portions of maxially bones
- nasal portion of the frontal bone
In the cranium, the opening to the nose is…
the piriform fossa
Muscles of the nose include…
- nasalis (opens nostrils)
- depressor septi (stabilizes septum)
- levator palpebrae superioris alaque (scrunches nose)
Areas near nasal septum
- vestibule (airway of external nose)
- limen nasi (skin-to-mucus-membrane connection)
Floor of nasal cavity
- palatine processes of maxillary bone
- horizontal plates of palatine bone
Roof of nasal cavity
formed by cribiform plate
Nasal conchae/turbinate bones
- found on lateral walls of nasal cavity
- covered by mucous membrane (warms and humidifies air)
- superior and middle conchae (inferior is its own bone) are part of ethmoid bone
Meati (“passageways”)
- superior, middle, & inferior
- where nasolacrimal duct drains
Spheno-ethmoidal recess
where sphenoid sinus drains
Ethmoid bulla
- bulge lying underneath middle conchae
- caused by middle ethmoid air cells
Haitus semilunaris
cleft underneath middle conchae where maxillary sinus, frontal sinus, and anterior ethmoidal air cells drain
Opening for nasolacrimal duct
Lacrimal apparatus
