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The Nose/Paranasal Sinuses
The nose
35
Anatomy
Undergraduate 3
02/05/2014

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Cards

Term
What are the functions of the nose?
Definition
- Olfaction
- Prepares air for entry into respiratory tract
Term
Name the two parts of the nose
Definition
1. External nose
2. Internal nose
Term
What is the external nose made up of?
Definition
Two nostrils and the skeleton
Term
What makes up the skeleton of the external nose?
Definition
- The nasal bones
- Two sets of hyaline cartilage
Term
Name the 2 sets of cartilages
Definition
1. Septal cartilage
2. Alar cartilages
Term
What is the function of the septal cartilage?
Definition
Forms the interior part of the septum
Term
What are the lateral plates?
Definition
Sections of the septal cartilage that attach to the nasal bones on the outside of the nose
Term
What bone does the septal cartilage with articulate, posteriorly?
Definition
The bony nasal septum (ethmoid)
Term
(T/F) The alar cartilages are distal to the septal cartilages
Definition
True
Term
What do they form?
Definition
The tip of the nose
Term
What type of tissuse forms the rest of the structure of the nostril?
Definition
Fibroaereolar tissue
Term
What bones make up the internal nose?
Definition
1. Ethmoid
2. Vomer
3. Sphenoid
4. Palantine
Term
What structures does the internal nose connect?
Definition
External nose to the nasal choanae
Term
What contributes to the septum within the inner nose?
Definition
1. Vomer
2. Vertical plate of ethmoid bone - bony nasal septum
3. Septal cartilage
Term
What forms the roof of the nose? The floor?
Definition
1. Cribiform plate 2. Underside of the sphenoid
Term
What features are found on the lateral walls of the inner nose?
Definition
1. Chonchae (3)
2. Meatses (3)
3. Spheno-ethmoidal Recess
Term
Name the 3 conchae, and which bone each is part of
Definition
1. Superior - ethmoid
2. Middle - ethmoid
3. Inferior - each is an individual bone
Term
Where is the spheno-ethmoidal recess found? What type of tissue is found here?
Definition
Superior to the superior concha; olfactory mucosa on the roof
Term
Where are the meatuses found? Name them.
Definition
On the underside/behind of each concha; the superior, middle, and inferior meatuses
Term
Where do the air sinuses drain into?
Definition
All the meatuses and the recess
Term
Where do the lacrimal ducts drain into?
Definition
Inferior meatus
Term
What are paranasal air sinuses?
Definition
Pockets of air outside of the nasal cavity within bones
Term
Name the paranasal sinuses in the skull
Definition
1. Frontal sinuses
2. Maxillary sinus
3. Ethmoid sinuses
4. Sphenoid sinuses
Term
(T/F) These air sinuses have ducts that drain into the nasal cavity
Definition
True
Term
Describe the maxillary sinus
Definition
Large space in the maxilla, making it essentially a hollow bone
Term
Where do the ducts of the maxillary sinus drain?
Definition
Middle meatus
Term
what is the ostium? Where is it located?
Definition
The opening of the maxillary sinus into its duct; high on the medial wall
Term
Describe the ethmoidal sinuses
Definition
Series of small air-lined pockets in the lateral wall of the ethmoid bone
Term
(T/F) These sinuses are easy to see from the medial wall of the orbit
Definition
True
Term
Where does the anterior group of sinuses drain into?
Definition
The middle meatus
Term
Where does the posterior group of sinuses drain into?
Definition
The superior meatus
Term
Describe the frontal sinuses
Definition
Large spaces found above the margin of the orbit
Term
Where do the ducts of the frontal sinuses drain?
Definition
Middle meatus
Term
How many sphenoidal sinuses are there? Where are they found?
Definition
2; body of the sphenoid bone
Term
Where do they drain?
Definition
Spheno-ethmoidal recess
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