ENT Flashcards
Name the four major components of the upper respiratory tract
- Nose (and nasal passages)
- Paranasal sinuses
- Pharynx
- Larynx
Name the three regions of the inner nasal cavity (3):
Name the three regions of the inner nasal cavity (3):
1. Vestibule closest to the tip of the nose
2. Respiratory
3. Olfactory regions closest to cribiform plate
The vestibule portion of the nose is lined with _
The vestibule portion of the nose is lined with skin
The respiratory portion of the nose is lined with _
The respiratory portion of the nose is lined with mucosa and it is highly vascular
The olfactory region of the nose is the location of [specialized cells]
The olfactory region of the nose is the location of olfactory receptor neurons
The _ bone provides the roof of the inner nasal cavity and the medial and lateral walls
The ethmoid bone provides the roof of the inner nasal cavity and the medial and lateral walls
The anterior portion of the roof of the nasal cavity is formed by [bone]
The anterior portion of the roof of the nasal cavity is formed by frontal bone
The [cartilagenous + bony region] divides the nose
The nasal septum divides the nose
* Cartilage + ethmoid and vomer bone
The _ bone forms the external bridge between the orbits
The frontal bone forms the external bridge between the orbits
The posterior portion of the nasal cavity roof is formed by the _ bone
The posterior portion of the nasal cavity roof is formed by the sphenoid bone
In addition to the ethmoid bone, part of the medial wall is formed by the _ bone
In addition to the ethmoid bone, part of the medial wall is formed by the vomer bone
The floor of the nasal cavity is formed by [bone] and [bone]
The floor of the nasal cavity is formed by maxilla and palatine
The lateral wall of the nasal cavity is formed by the _ bone
The lateral wall of the nasal cavity is formed by the maxilla
We have three turbinates in the nose, the _ , _ , and _
We have three turbinates in the nose, the inferior , middle , and superior
The turbinates’ bony component is called _ , but the term turbinate includes the mucosa lining
The turbinates’ bony component is called conchae but the term turbinate includes the mucosa lining
The purpose of the turbinates is to _
The purpose of the turbinates is to humidify and warm the air
* Turbinates provide a large surface area –> cause tubulent mixing which helps to warm and humidify
ID the three turbinates
The [structures] are the spaces between the turbinates that direct airflow and allow drainage from the sinuses/ nasolacrimal duct
The meatuses are the spaces between the turbinates that direct airflow and allow drainage from the sinuses/ nasolacrimal duct
* Inferior, middle, superior meatuses
The superior meatus drains the _ sinus
The superior meatus drains the posterior ethmoid sinus
* Located between the superior and middle turbinate
The middle meatus drains the [sinuses]
The middle meatus drains the frontal, anterior and middle ethmoid, maxillary sinuses
* Located between the middle and inferior turbinates
The inferior meatus drains the _
The inferior meatus drains the nasolacrimal duct (drains tears from the eye)
* This is why the nose runs when a person cries
The sphenoid sinus is drained by the _
The sphenoid sinus is drained by the sphenoethmoidal recess
* Also helps drain the posterior ethmoid sinus
The nose’s blood supply branches off of two major arteries, _ and _
The nose’s blood supply branches off of two major arteries, internal carotid and external carotid
_ is a collection of small vessels that supplies the anterior nasal septum
Kiesselbach plexus is a collection of small vessels that supplies the anterior nasal septum
* Branches off of internal and external carotid arteries
_ is a collection of vessels responsible for posterior epistaxis
Woodruff’s plexus is a collection of vessels responsible for posterior epistaxis
* These nose bleeds are generally more severe
Anterior nose bleeds arise from bleeding at the [vessels]
Anterior nose bleeds arise from bleeding at the Kiesselbach plexus
* These are more common and less severe
Special sensory innervation to the nose comes from [nerve], while sensory innervation comes from [nerve]
Special sensory innervation to the nose comes from CN I, while sensory innervation comes from CN V
The nasal septum and the lateral walls of the nose are innervated by branches of [nerve]
The nasal septum and the lateral walls of the nose are innervated by branches of V1
The postero-inferior half to two-thirds of the nasal mucosa is innervated by [nerve]
The postero-inferior half to two-thirds of the nasal mucosa is innervated by V2
In addition to conchae, [nasal cavity feature] also helps to increase temperature of air
In addition to conchae, rich vascular network (capillaries) also helps to increase temperature of air
Olfactory receptor cells of CN I are found in the _ of the _ bone
Olfactory receptor cells of CN I are found in the cribiform plate of the ethmoid bone
* Responsible for smell
Mucus and vibrissae (stiff hairs in nose) help to [function]
Mucus and vibrissae (stiff hairs in nose) help to filter debris in the air
Allergies cause a runny nose via histamines triggering _
Allergies cause a runny nose via histamines triggering capillary leakage
Name the (4) paranasal sinuses
Name the (4) paranasal sinuses
1. Frontal
2. Sphenoid
3. Maxillary
4. Ethmoid
ID the sinus
Ethmoid sinus
ID the sinus
Frontal sinus
ID the four paired paranasal sinuses
The small canals that connect the sinuses to the lateral nasal wall are called _
The small canals that connect the sinuses to the lateral nasal wall are called ostia
* Form the osteomeatal complex
The frontal, ethmoid, sphenoid sinuses/bone are innervated by [nerve]
The frontal, ethmoid, sphenoid sinuses/bone are innervated by opthalmic nerve (V1)
The maxillary sinus is innervated by [nerve]
The maxillary sinus is innervated by maxillary nerve (V2)
Blood supply to the frontal and ethmoid sinuses comes from branches of [artery]
Blood supply to the frontal and ethmoid sinuses comes from branches of opthalmic artery (from internal carotid)
Blood supply to the sphenoid and maxillary sinuses comes from branches of [artery]
Blood supply to the sphenoid and maxillary sinuses comes from branches of maxillary artery (external carotid)
ID the bone
Ethmoid bone
ID the bone
Sphenoid bone
ID the bone
Frontal bone
Name (4) functions of the paranasal sinuses:
Name (4) functions of the paranasal sinuses:
1. Lighten the weight of the head
2. Activate immune system against pathogens
3. Humidies inspired air
4. Increase vocal resonance
The pharynx is a shared space for air and food until [region] where the respiratory and GI tracts will diverge
The pharynx is a shared space for air and food until laryngopharynx where the respiratory and GI tracts will diverge
ID the (3) regions of the pharynx
Name the borders of the nasopharynx:
Superior:
Inferior:
Anterior:
Posterior:
Name the borders of the nasopharynx:
Superior: skull base
Inferior: soft palate
Anterior: back of nose
Posterior: vertebral bodies
Another name for the eustachian tube is _
Another name for the eustachian tube is pharyngotympanic tube
* Tells you that it connects the nasopharynx to the middle ear
* Functions to equalize pressures of the middle ear
ID the structure found in the nasopharynx
Adenoid (pharyngeal tonsils)
If an adult presents with unilateral fluid in the ear you need to rule out _
If an adult presents with unilateral fluid in the ear you need to rule out nasopharyngeal carcinoma
* A mass can cause chronic otitis media
The primary blood supply to the nasopharynx is _
The primary blood supply to the nasopharynx is ascending pharyngeal artery (external carotid branch)
Venous drainage of the nasopharynx occurs via the _ and _
Venous drainage of the nasopharynx occurs via the pterygoid plexus and pharyngeal venous plexus
* These go into the internal jugular vein
The nasopharynx is innervated by the pharyngeal plexus which gets contributions from [CN] and [CN]
The nasopharynx is innervated by the pharyngeal plexus which gets contributions from glassopharyngeal nerve and vagus nerve
* The sympathetic fibers from the superior cervical ganglion also contribute to motor innervation