Nose Anatomy Overview
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Questions and Answers

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.

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.

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?

<p>Rhinophyma is a lobulated tumor caused by hypertrophy of the sebaceous glands in the skin covering the nose.</p> Signup and view all the answers

What are the five main cartilages that form the cartilaginous part of the nose?

<p>The five main cartilages are two lateral cartilages, a single median septal cartilage, and two major alar cartilages.</p> Signup and view all the answers

How do the lateral cartilages articulate with other structures in the nose?

<p>The lateral cartilages articulate with the frontal process of the maxilla and nasal bone, and below with the major alar cartilages, while medially they connect with the septal cartilage.</p> Signup and view all the answers

What is the role of sebaceous glands in the skin of the nose?

<p>Sebaceous glands in the skin of the nose secrete oil, which helps keep the skin moisturized and can contribute to conditions like rhinophyma when hypertrophied.</p> Signup and view all the answers

Explain why the skin covering the nose is described as being thin and loosely attached.

<p>The skin is thin and loosely attached to allow for flexibility and movement, which is important for the dynamic structures of the nose.</p> Signup and view all the answers

What is the significance of the piriform aperture in relation to the external nose?

<p>The piriform aperture is the bony part that forms the lower end of the external nose and serves as an important structural feature for its overall shape.</p> Signup and view all the answers

What role does the nose play in conditioning inspired air?

<p>The nose conditions inspired air by warming, humidifying, and filtering it before it reaches the lungs.</p> Signup and view all the answers

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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Anatomy of the Nose PDF

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.

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