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Questions and Answers
What divides the external nose and the nasal cavity into right and left halves?
What divides the external nose and the nasal cavity into right and left halves?
Which artery supplies the skin of the external nose?
Which artery supplies the skin of the external nose?
What forms the framework of the external nose below?
What forms the framework of the external nose below?
Which nerve supplies the skin of the ala and the lower part of the septum?
Which nerve supplies the skin of the ala and the lower part of the septum?
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What forms the lateral margin of the external nose?
What forms the lateral margin of the external nose?
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What is the function of the paranasal sinuses?
What is the function of the paranasal sinuses?
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Which artery anastomoses with the septal branch of the superior labial branch of the facial artery in the region of the nasal cavity vestibule?
Which artery anastomoses with the septal branch of the superior labial branch of the facial artery in the region of the nasal cavity vestibule?
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Which nerve supplies the olfactory nerves from the olfactory mucous membrane in the nasal cavity?
Which nerve supplies the olfactory nerves from the olfactory mucous membrane in the nasal cavity?
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Where is Kiesselbach's plexus located in the nasal cavity?
Where is Kiesselbach's plexus located in the nasal cavity?
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Which bone contains the ethmoid sinuses and separates them from the orbit?
Which bone contains the ethmoid sinuses and separates them from the orbit?
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Which arteries anastomose to form Kiesselbach's plexus in the nasal cavity?
Which arteries anastomose to form Kiesselbach's plexus in the nasal cavity?
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Which sinuses lie within the body of the sphenoid bone and extend between the dorsum sellae and post clinoid processes?
Which sinuses lie within the body of the sphenoid bone and extend between the dorsum sellae and post clinoid processes?
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Which nerves supply the olfactory nerves from the olfactory mucous membrane in the nasal cavity?
Which nerves supply the olfactory nerves from the olfactory mucous membrane in the nasal cavity?
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What is the main function of the paranasal sinuses?
What is the main function of the paranasal sinuses?
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Which arteries are involved in providing blood supply to the nasal cavity?
Which arteries are involved in providing blood supply to the nasal cavity?
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Where is Kiesselbach's plexus located in the nasal cavity?
Where is Kiesselbach's plexus located in the nasal cavity?
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Which artery supplies the skin of the external nose?
Which artery supplies the skin of the external nose?
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What divides the external nose and the nasal cavity into right and left halves?
What divides the external nose and the nasal cavity into right and left halves?
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Which nerve supplies the skin of the ala and the lower part of the septum?
Which nerve supplies the skin of the ala and the lower part of the septum?
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What forms the framework of the external nose below?
What forms the framework of the external nose below?
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Study Notes
The Nose
- The nose consists of the external nose and the nasal cavity, divided by a septum into right and left halves.
- The external nose has two elliptical orifices called the naris (nostrils), separated from each other by the nasal septum.
- The lateral margin, the ala nasi, is rounded and mobile.
Framework of the External Nose
- Above, the framework is formed by the nasal bones, frontal processes of the maxillae, and the nasal part of the frontal bone.
- Below, the framework is formed of plates of hyaline cartilage.
Blood Supply of the External Nose
- The skin of the external nose is supplied by branches of the ophthalmic and maxillary arteries.
- The skin of the ala and the lower part of the septum are supplied by branches from the facial artery.
Nerve Supply of the External Nose
- Supplied by the infra-trochlear and external nasal branches of the ophthalmic nerve (CN V).
- Supplied by the infraorbital branch of the maxillary nerve (CN V).
Nasal Cavity
- Has a floor, a roof, a lateral wall, and a medial or septal wall.
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Description
Test your knowledge of the anatomy of the nose and paranasal sinus with this quiz. Explore the external nose, nasal cavity, and their structures and functions.
