Podcast
Questions and Answers
What structures form the nose above?
What structures form the nose above?
- Nasal bones, Maxillary sinuses, Sphenoid bone
- Nasal bones, Frontal processes of maxillae, Nasal part of frontal bone (correct)
- Anterior nares, Posterior nares, Frontal bone
- Upper cartilage, Lower cartilage, Septal cartilage
Which type of cartilage is involved in the structure of the lower part of the nose?
Which type of cartilage is involved in the structure of the lower part of the nose?
- Elastic cartilage
- Fibrocartilage
- Reticular cartilage
- Hyaline cartilage (correct)
What separates the right and left halves of the nasal cavity?
What separates the right and left halves of the nasal cavity?
- Frontal bone
- Lateral cartilage
- Lateral wall
- Nasal septum (correct)
Where does the nasal cavity extend from and to?
Where does the nasal cavity extend from and to?
Which part of the nasal structure includes the upper and lower nasal cartilages?
Which part of the nasal structure includes the upper and lower nasal cartilages?
What is the nose attached to the forehead by?
What is the nose attached to the forehead by?
Which part of the respiratory system is externally visible?
Which part of the respiratory system is externally visible?
What are the anterior openings of the nose called?
What are the anterior openings of the nose called?
What bounds each nostril laterally?
What bounds each nostril laterally?
How many openings does the nose have?
How many openings does the nose have?
What forms the floor of the nasal cavity?
What forms the floor of the nasal cavity?
Which bone is part of the roof of the nasal cavity?
Which bone is part of the roof of the nasal cavity?
Which structure forms the posterior part of the nasal septum?
Which structure forms the posterior part of the nasal septum?
What covers the nasal septum?
What covers the nasal septum?
Which bone forms the superior part of the nasal septum?
Which bone forms the superior part of the nasal septum?
Which of the following structures is covered by a mucous membrane?
Which of the following structures is covered by a mucous membrane?
How many horizontal bony projections does the lateral wall show?
How many horizontal bony projections does the lateral wall show?
Which conchae is NOT one of the three horizontal bony projections in the lateral wall?
Which conchae is NOT one of the three horizontal bony projections in the lateral wall?
What is another name for the conchae?
What is another name for the conchae?
Which of the following best describes the orientation of the bony projections in the lateral wall?
Which of the following best describes the orientation of the bony projections in the lateral wall?
What structure separates the nasal cavity from the cranial cavity?
What structure separates the nasal cavity from the cranial cavity?
Where is the optic nerve positioned in relation to the ethmoid air sinuses?
Where is the optic nerve positioned in relation to the ethmoid air sinuses?
Which concha is the largest and visible in the anterior portion of the nasal cavity?
Which concha is the largest and visible in the anterior portion of the nasal cavity?
What is the function of the sella turcica?
What is the function of the sella turcica?
What is the vestibulum of the nasal cavity?
What is the vestibulum of the nasal cavity?
Which sinus is situated above the cribriform plate?
Which sinus is situated above the cribriform plate?
Where is the posterior nasopharyngeal tonsil located?
Where is the posterior nasopharyngeal tonsil located?
Which meatus is associated with the ethmoid air sinuses?
Which meatus is associated with the ethmoid air sinuses?
What is one of the primary functions of the paranasal sinuses?
What is one of the primary functions of the paranasal sinuses?
Which specific bones form the roof of the maxillary sinus?
Which specific bones form the roof of the maxillary sinus?
Into which structure do the maxillary sinuses open?
Into which structure do the maxillary sinuses open?
Which nerves supply the maxillary sinuses?
Which nerves supply the maxillary sinuses?
Which anatomical structure forms the floor of the maxillary sinus?
Which anatomical structure forms the floor of the maxillary sinus?
Which imaging technique is considered the most reliable for determining if the sinuses are obstructed?
Which imaging technique is considered the most reliable for determining if the sinuses are obstructed?
Where are the frontal sinuses located?
Where are the frontal sinuses located?
Which of the following characteristics describe CT scanning?
Which of the following characteristics describe CT scanning?
For diagnosing sinusitis, which is the best imaging modality?
For diagnosing sinusitis, which is the best imaging modality?
Which sinuses are located within the maxillary bone?
Which sinuses are located within the maxillary bone?
Which nerve supplies the sphenoidal sinuses?
Which nerve supplies the sphenoidal sinuses?
Where do the sphenoidal sinuses open into?
Where do the sphenoidal sinuses open into?
Which function is NOT associated with the sphenoidal sinuses?
Which function is NOT associated with the sphenoidal sinuses?
How many sphenoidal sinuses are there?
How many sphenoidal sinuses are there?
Where is the maxillary sinus located?
Where is the maxillary sinus located?
Where are the frontal sinuses located?
Where are the frontal sinuses located?
Which group of ethmoidal sinuses opens into the infundibulum?
Which group of ethmoidal sinuses opens into the infundibulum?
What divides the frontal sinuses from one another?
What divides the frontal sinuses from one another?
Where does the middle group of the ethmoidal sinuses open?
Where does the middle group of the ethmoidal sinuses open?
Where are the maxillary sinuses located?
Where are the maxillary sinuses located?
What role does the nasal cavity play in vocal sounds?
What role does the nasal cavity play in vocal sounds?
Which part of the nasal cavity is specifically involved in the sense of smell?
Which part of the nasal cavity is specifically involved in the sense of smell?
Which of the following is NOT a function of the nasal cavity?
Which of the following is NOT a function of the nasal cavity?
What is the primary function of the cilia in the paranasal sinuses?
What is the primary function of the cilia in the paranasal sinuses?
Where are the paranasal sinuses located?
Where are the paranasal sinuses located?
Which of the following bones do not house any of the paranasal sinuses?
Which of the following bones do not house any of the paranasal sinuses?
Flashcards are hidden until you start studying
Study Notes
Nose
- The nose is the only externally visible part of the respiratory system.
- It has a free tip and is attached to the forehead by the root or bridge.
- The nose has two openings, the anterior (external) nares or nostrils, which lead to the nasal cavity.
- Each nostril is bounded laterally by the ala and medially by the nasal septum.
- The nose consists of a bony and cartilaginous framework.
- The bony framework is formed by the nasal bones, frontal processes of maxillae, and nasal part of frontal bone.
- The cartilaginous framework is formed by plates of hyaline cartilage, which include upper and lower nasal cartilages and the septal cartilage.
Nasal Cavity
- The nasal cavity extends from the external (anterior) nares to the posterior nares (choanae).
- The nasal cavity is divided into right and left halves by the nasal septum.
- Each half has a floor, roof, lateral wall, and medial wall (septum).
- The nasal septum is formed by the vertical (perpendicular) plate of ethmoid bone, vomer bone, and septal cartilage.
- The cribriform plate of ethmoid bone is located at the roof of the nasal cavity and separates the nasal cavity from the cranial cavity above it.
- The frontal sinus is situated above the cribriform plate.
- The sphenoid sinus is visible behind the cribriform plate.
- The ethmoid air sinuses are located lateral to the cribriform plate and are closely associated with the olfactory region.
Functions of the Nose and Nasal Cavity
- The nose and nasal cavity are responsible for:
- Conditioning the air (warming, humidifying, and filtering)
- Producing sounds (through vibrations of the nasal cavity)
- Olfaction (smell)
- Aesthetic appeal (shaping the face)
Paranasal Sinuses
- Paranasal sinuses are air-filled cavities located within the bones of the skull surrounding the nasal cavity.
- They are lined with mucous membranes and are connected to the nasal cavity through small openings.
- Functions of paranasal sinuses include:
- Lightening the skull
- Acting as resonant chambers for speech
- Warming, cleaning, and moistening the incoming air
Maxillary Sinuses
- Located within the body of the maxilla
- Pyramidal in shape with the base forming the lateral wall of the nose and the apex lying in the zygomatic process of the maxilla
- Roof: formed by the floor of the orbit
- Floor: formed by the alveolar border
- Opens into the middle meatus through the hiatus semilunaris
- Supplied by superior alveolar and infraorbital nerves
Frontal Sinuses
- Located within the frontal bone
- Two in number
- Connected to the nasal cavity through the nasofrontal duct
Ethmoid Sinuses
- Located within the ethmoid bone
- Consist of multiple air-filled cells
- Divided into anterior, posterior, and middle groups
Sphenoid Sinuses
- Located within the body of the sphenoid bone
- Two in number
- Open into the sphenoethmoidal recess
- Supplied by the posterior ethmoidal nerve
Diagnosis of Paranasal Sinuses Defect
- Diagnosis can be made using X-ray and Computed Tomography (CT)
- CT scanning is painless, noninvasive, and accurate
- CT scanning is the most reliable imaging technique for determining if the sinuses are obstructed
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
