Nasal Cavity & Paranasal Sinuses Flashcards
what separates the nose from the oral cavity?
hard palate
what are the anterior apertures of the nose?
Nares (nostrils)
what are the posterior apertures of the nose?
Choanae (open into the nasopharynx)
what bones make up the external nose?
- nasal bones
- frontal processes of maxillae
what muscles overlie the bones & cartilage of the external nose?
- nasalis
- depressor septi nasi
- levator labii superioris alaeque nasi
what bones make up the floor of the nasal cavity?
- palatine process of maxillae
- horizontal plate of the palatine bones
what are the nares?
anterior opening of the nasal cavities
what is located in the incisive canal?
- nasopalatine nerve
- greater palatine artery
what is the nasal crest?
ridge formed at the connection of paired maxillae and palatine bones
what attaches to the nasal crest?
the vomer & nasal septum
what is the medial wall of the nasal cavity?
nasal septum
what are the main components of the nasal septum?
- septal cartilage
- perpendicular plate of the ethmoid bone
- vomer
what is septal deviation & its causes?
condition in which the septum is displaced away from the midline
- birth defect
- injury
what are the symptoms of septal deviation?
- snoring
- difficulty breathing through nose
- nosebleeds
what forms the roof of the nasal cavity?
cribiform plate of the ethmoid bone
