Anatomy of the Larynx Flashcards
Describe the blood supply to the medial and lateral walls of the nasal cavity?
Anterior and posterior ethmoidal (from the ophthalmic artery), sphenopalatine and greater palatine arteries (from the maxillary artery) and the septal branch of the superior labial artery (from the facial artery)
Name the five arteries that supply the nasal cavity
Anterior ethmoidal, posterior ethmoidal, sphenopalatine, greater palatine and septal bench of the superior labial artery
What are air sinuses?
Paranasal sinuses are air-filled extensions of the respiratory part of the nasal cavity connected by small openings into the cavity
What is the purpose of nasal air sinuses?
The mucosa of the sinuses helps to warm and humidify the air as it comes in. The air sinuses also aid in lightening the skull and enhancing vocal resonance
What are the four main types of nasal air sinus?
Frontal, maxillary, sphenoid and ethmoid air cells
Which three structures make up the nasal septum?
Anterior = septal cartilage Superior = perpendicular plate of ethmoid bone Inferior/posterior = vomer bone
What are nasal conchae?
Long, narrow, curled shelf of bone that protrudes into the breathing passage of the nose
Define epistaxis
Bleeding from the nose
What is Kiesselbach’s plexus? What is it’s clinical significance?
The region in the anteroinferior part of the nasal septum where all of the arteries supplying the nasal cavity anastomose to form a vascular plexus
What is sinusitis?
Where the linings of the sinuses become inflamed
Name the four different types of tonsil
Adenoid (pharyngeal tonsil), tubal tonsil, palatine tonsil and lingual tonsil
Where are the adenoids located (pharyngeal tonsil)?
In the roof of the pharynx
Define tonsil
Tonsils are collections of lymphoid tissue facing into the aerodigestive tract.
Where are the tubal tonsils located?
In the roof of the pharynx
Where are the palatine tonsils located?
At the sides of oropharynx between palatoglossal
and palatopharyngeal arches
Where is the lingual tonsil located?
Behind terminal sulcus (tongue)
What is the blood supply to the palatine tonsil
Blood supply is provided by tonsillar branches of five arteries:
> dorsal lingual artery
> ascending palatine artery
> descending palatine artery
> tonsillar branch (of the facial artery)
> ascending pharyngeal artery
What is the function of tonsils?
These immunocompetent tissues are the immune system’s first line of defense against ingested or inhaled foreign pathogens