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Questions and Answers
What divides the nasal cavity into two halves?
What divides the nasal cavity into two halves?
Which structure divides the nasal cavity into proper nasal cavity and nasal vestibule?
Which structure divides the nasal cavity into proper nasal cavity and nasal vestibule?
Which structure forms the roof of the nasal cavity?
Which structure forms the roof of the nasal cavity?
Which structure is not a part of the lateral wall of the nasal cavity?
Which structure is not a part of the lateral wall of the nasal cavity?
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Which structure is located in the olfactory region of the nose?
Which structure is located in the olfactory region of the nose?
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Which structure is not a paranasal sinus?
Which structure is not a paranasal sinus?
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What is the function of the nasal cavity?
What is the function of the nasal cavity?
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Which sinus drains into the mid-meatus through the semilunar hiatus?
Which sinus drains into the mid-meatus through the semilunar hiatus?
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Where do the ethmoidal sinuses drain into?
Where do the ethmoidal sinuses drain into?
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Which structure has openings that pass through the nasal cavity?
Which structure has openings that pass through the nasal cavity?
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What is the function of the nasal meatuses?
What is the function of the nasal meatuses?
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Which structure is responsible for warming and moistening the inspired air?
Which structure is responsible for warming and moistening the inspired air?
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Where does the Sphenoidal sinus open?
Where does the Sphenoidal sinus open?
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Which part of the nasal cavity does the Maxillary sinus open into?
Which part of the nasal cavity does the Maxillary sinus open into?
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Where do the Anterior & Mid groups of Ethmoidal sinuses open?
Where do the Anterior & Mid groups of Ethmoidal sinuses open?
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Which part of the body is situated in the anterior part of the larynx neck?
Which part of the body is situated in the anterior part of the larynx neck?
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What is located posteriorly to the part situated in the anterior part of the larynx neck?
What is located posteriorly to the part situated in the anterior part of the larynx neck?
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Where does the Maxillary sinus open?
Where does the Maxillary sinus open?
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Study Notes
Nasal Cavity
- Divided into two halves by the nasal septum
- Consists of two parts: nasal vestibule and proper nasal cavity
- Boundaries:
- Medial wall: nasal septum
- Roof: cribriform plate of ethmoid
- Floor: hard and soft palate
Lateral Wall of Nasal Cavity
- Three nasal conchae: superior, middle, and inferior
- Three nasal meatuses: superior, middle, and inferior
Medial Wall of Nasal Cavity (Nasal Septum)
- Composed of bone and cartilage
- Structures: perpendicular plate of ethmoid, septal cartilage, palatine process of maxilla, and vomer
Mucous Membrane of Nose
- Olfactory region: located in the upper nasal cavity, contains olfactory cells
- Respiratory region: situated outside of olfactory region, functions to warm, moisten, and clean inspired air
Paranasal Sinuses
- Four paired sinuses: frontal, sphenoidal, maxillary, and ethmoidal
- Each sinus has an opening that passes into the nasal cavity
- Functions: air-filled cavities in the cranium surrounding the nasal cavity
Paranasal Sinuses and Their Site of Drainage
- Frontal sinus: drains into the middle meatus via infundibulum
- Maxillary sinus: drains into the middle meatus through semilunar hiatus
- Sphenoidal sinus: drains into the sphenoethmoidal recess
- Ethmoidal sinuses:
- Anterior group: drains into the middle meatus
- Middle group: drains into the middle meatus
- Posterior group: drains into the superior nasal meatus
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Description
Test your knowledge on the anatomy of the nasal cavity, including its functions, structures, and associated sinuses. Identify key components such as the olfactory region, nasal septum, and paranasal sinuses.
