TBL 26: Nose, Nasal Cavity, Palate, Pterygopalatine fossa, & oral cavity Flashcards
What are the middle and superior concha derived from?
Ethmoid bone
What is the septal nasal cartilage?
anterior portion of the nasal septum that helps to separate the cartilaginous skeleton into left and right halves
What are the boundaries of nasal cavity? (lateral wall components & roof)
Lateral wall (anterior to posterior): Maxilla+ ethmoid+ vertical plate of palatine bone
Roof: Cribiform plate of the ethmoid bone, superior nasal concha, superior aspect of nasal septum
What are the components of the nasal septum?
Anterior portion: nasal septal cartilage
Posterior portion: Perpendicular plate of ethmoid bone + vomer bone
Inferior portion: Attached to the hard palate
Where is respiratory mucosa found? What’s its function?
Lines the nasal septum, nasal cavity, & paranasal sinuses. Helps to provide mucociliary flow w/ cilia that moves any inspired objects into the pharynx
What are paranasal sinuses? How do they help?
These are air-filled cavities in the cranial bone that are associated w/ the nasal cavity. Openings in the nasal cavity allow for the respiratory mucosa to line these sinuses.
Their mucociliary flow drains mucosa from the sinuses into the nasal cavity
These help to reduce the muscular workload needed to maintain the head in an upright position
What are the four paranasal sinuses? How does ethmoidal sinus differ from the other three?
Ethmoidal, Frontal, Sphenoid, Maxillary
While frontal, sphenoid, & maxillary sinuses are single chambered, ethmoidal air cells in the ethmoidal sinus subdivide it into Anterior, Middle, & Posterior sections
Into which parts of the nasal cavity, do the different sinuses drain?
Posterior ethmoidal sinus drains into superior meatus
Anterior ethmoidal, Middle ethmoidal, & frontal, maxillary sinus drain into middle meatus
Sphenoid sinus into sphenoethmoidal recess (posterior to superior concha)
What is the kiesselbach area?
Found in the anterior nasal septum, it is a location where the sphenopalatine artery anastomoses w/ multiple other arteries
How do the primary palate & secondary palate form?
Primary palate = when the medial nasal prominences fuse, they cause the maxillary prominences to fuse and create the intermaxillary segment that makes the primary palate
Secondary palate = Palatine shelves (outgrowths from the maxillary prominence) come out from the maxillary prominence and fuse together at the midline along with the nasal septum
How does the nasal cavity and septum form?
The nasal pits on the placodes invaginate further creating the nasal cavity and leaving some barrier between them (turns into the nasal septum)
What bones constitute the hard palate?
Horizontal plates of the palatine bone combine w/ the secondary palate
What’s the difference b/w the posterior & anterior tongue?
Posterior: back third attached to hyoid bone & mandible. Have lingual tonsils.
Anterior: anterior 2/3rds & free moving w/ tiny papillae on the dorsal surface
Where are the large papillae found in your tongue?
At the junction b/w the anterior & posterior portion of the tongue you have a V-shaped row of large papillae. Epithelium of these have taste buds in them
What are the three types of cells that make up taste buds?
Taste cells, sustentacular/supporting cells, basal cells
