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What are the main functions of the nose?
What are the main functions of the nose?
The main functions of the nose are respiration, olfaction, protection of the lower respiratory passage, conditioning of inspired air, vocal resonance, and nasal reflex function.
Identify the parts of the external nose.
Identify the parts of the external nose.
The parts of the external nose include the tip/apex, root/bridge, dorsum, nostrils/nares, and ala.
Describe the structural differences between the upper and lower parts of the external nose.
Describe the structural differences between the upper and lower parts of the external nose.
The upper 1/3 of the external nose is bony, formed by two nasal bones and the frontal process of the maxillae, while the lower 2/3 is cartilaginous composed of five main cartilages.
What is rhinophyma and what causes it?
What is rhinophyma and what causes it?
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What are the five main cartilages that form the cartilaginous part of the nose?
What are the five main cartilages that form the cartilaginous part of the nose?
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How do the lateral cartilages articulate with other structures in the nose?
How do the lateral cartilages articulate with other structures in the nose?
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What is the role of sebaceous glands in the skin of the nose?
What is the role of sebaceous glands in the skin of the nose?
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Explain why the skin covering the nose is described as being thin and loosely attached.
Explain why the skin covering the nose is described as being thin and loosely attached.
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What is the significance of the piriform aperture in relation to the external nose?
What is the significance of the piriform aperture in relation to the external nose?
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What role does the nose play in conditioning inspired air?
What role does the nose play in conditioning inspired air?
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Study Notes
Nose Anatomy
- The nose is the uppermost part of the respiratory tract and the peripheral organ of smell.
- It has an external nose and a nasal cavity.
- Functions include respiration, olfaction, protection of the lower respiratory passage, conditioning inspired air, vocal resonance, and the nasal reflex (sneezing).
External Nose Structure
- It's a pyramidal projection in the mid-face.
- Parts include the tip/apex, root/bridge, dorsum, nostrils/nares, and alae.
- The skin is thin and loosely attached, thicker and more adherent with large sebaceous glands on the apex and alae. Hypertrophy of these glands can cause rhinophyma.
- The skeleton is 1/3 bony and 2/3 cartilaginous.
Bony Framework
- Formed by two nasal bones (nose bridge), frontal processes of the maxillae.
- The bony part ends at the piriform aperture.
Cartilaginous Framework
- Consists of five main cartilages and several smaller ones.
- The five main cartilages are two lateral cartilages (superior lateral), a single median septal cartilage, and two major alar cartilages (inferior lateral). Minor alar or sesamoid cartilages are also present.
- Cartilaginous tissue is anchored to the piriform aperture by fibrous tissue.
- Lateral cartilages articulate with the frontal process of the maxilla and nasal bone, major alar cartilages, and the septal cartilage.
Blood Supply of the Nose
- (The provided text does not detail the arteries of the nose.)
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Description
Explore the complex structures and functions of the nose in this quiz. From the external nose's pyramidal projection to the intricate bony and cartilaginous frameworks, gain an understanding of the respiratory tract's uppermost part. Test your knowledge on its anatomical features and significant roles in respiration and olfaction.