Histology Of The Respiratory System

Histology Of The Respiratory System

Histology of Lung
Answer:

• The lung is divided into numerous lobules
• These lobules are obtained by following branching

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Histology of lung Branching:

• Principal bronchus divides into secondary or lobar bronchi
• Each lobar bronchi divides into tertiary or segmental bronchi
• Each segmental bronchi divides into smaller bronchi that end in bronchioles

Histology of lung Changes seen in subsequent branching:

• Cartilage becomes irregular
• Amount of muscle increases
• Subepithelial lymphoid tissue increases
• Epithelial changes occur from pseudostratified to cuboidal epithelium

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Histology of lung Structure of lung:

• The lung is divided into numerous lobules
• These lobules receives lobular bronchiole
• Lobular bronchiole divides into terminal bronchiole
• Each terminal bronchiole ends into respiratory bronchiole Each respiratory bronchiole ends into alveolar ducts
• Each alveolar duct ends into atrium which leads to alveolar sacs
• Each alveolar sac contains alveoli

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