Podcast Beta
Questions and Answers
What is the primary function of the paranasal sinuses?
At birth, which sinus is not present?
What is the purpose of the nasal cavity?
What is the location of the maxillary sinus?
Signup and view all the answers
What is the function of the nasal septum?
Signup and view all the answers
What is another function of the paranasal sinuses?
Signup and view all the answers
What is the function of the superior meatus?
Signup and view all the answers
How many nasal conchae are there?
Signup and view all the answers
What is the name of the artery that supplies blood to the nose?
Signup and view all the answers
What is the function of the olfactory nerves?
Signup and view all the answers
What is located in the spheno-ethmoidal recess?
Signup and view all the answers
What nerve supplies the respiratory area?
Signup and view all the answers
Which part of the face do the two halves of the nasal cavity open through?
Signup and view all the answers
Which bone forms the posterior part of the roof of the nasal cavity?
Signup and view all the answers
What is the function of the nasal vibrissae found in the vestibule?
Signup and view all the answers
Which bone forms the antero-inferior part of the medial wall of the nasal cavity?
Signup and view all the answers
What is the name of the area of the nasal cavity that lies immediately above the nostril?
Signup and view all the answers
How many areas does the lateral wall of the nasal cavity subdivide into?
Signup and view all the answers
Study Notes
Paranasal Sinuses
- Definition: Air-filled spaces in certain bones surrounding the nasal cavity, opening into the lateral wall of the nose.
- Functions: Warming and humidifying inspired air, diminishing skull weight, and adding voice resonance.
List of Paranasal Sinuses
- Maxillary sinus: Inside the maxilla body.
- Frontal sinus: Between the frontal bone plates (develops during the 2nd year of life).
- Sphenoidal sinus: Inside the sphenoid bone.
- Ethmoidal sinuses: Inside the ethmoidal labyrinth (anterior, middle, and posterior groups).
Nasal Cavity
- Organ of breathing (cleans, warms, and moistens inspired air) and olfactory function.
- Subdivided into right and left halves by the nasal septum.
- Conchae: Bony plates covered with mucous membrane (superior, middle, and inferior nasal conchae).
- Meatuses: Depressions below each concha (superior, middle, and inferior meatuses).
- Superior meatus: Receives posterior ethmoidal air sinus opening.
- Middle meatus: Receives openings of frontal, anterior and middle ethmoidal, and maxillary air sinuses.
- Inferior meatus: Receives nasolacrimal duct.
Spheno-ethmoidal Recess
- Triangular fossa between the superior concha and nasal roof, receiving the sphenoidal air sinus opening.
Arterial Blood Supply of Nose
- Maxillary artery (branch of the external carotid artery).
Nerve Supply of Nose
- Olfactory area (1 cm): Olfactory nerves (roof and upper parts of both septum and lateral nasal walls).
- Respiratory area: Maxillary nerve (part of trigeminal nerve).
Bony Skeleton of Nasal Cavity
- Roof: Nasal process of frontal bone, nasal bone, cribriform plate of ethmoid bone, and body of sphenoid bone.
- Floor: Palatine process of maxilla and palatine bone.
- Nasal septum: Vomer, perpendicular plate of ethmoid bone, and septal cartilage.
- Lateral wall: Vestibule (lined with skin containing hair) and area of nasal conchae and meatuses.
Openings in Lateral Wall of Nasal Cavity
- Superior meatus: Posterior ethmoidal air sinus.
- Middle meatus: Frontal, anterior and middle ethmoidal, and maxillary air sinuses.
- Inferior meatus: Nasolacrimal duct.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Related Documents
Description
This quiz covers the anatomy of paranasal sinuses, including their clinical importance, nasal cavity features, and supply systems. Students will be able to describe and list the paranasal sinuses and their functions.
