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Bronchi Anatomy | Bronchial Wall Anatomy | Bronchus Wall Anatomy

The bronchiole in cross section view
The Bronchiole Wall
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  • image descriptionRespiratory mucosa (or mucous membrane) lines the luminal surface. Mucus-secreting goblet cells are present in the epithelium. However, they are less numerous than in the trachea.
The bronchiole in cross section view
The respiratory mucosa
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  • Deep to the mucosa is a layer containing smooth muscle fibers, hyaline cartilage, and scattered seromucous and mucous glands.
  • The cartilage appears as rings in the larger bronchi but changes to irregular-sized image descriptionplates in the smaller bronchi. As in the trachea, the cartilage helps keep the bronchial wall from collapsing.
The bronchiole in cross section view
The Cartilage Plate
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  • The image descriptionsmooth muscle fibers are located between the mucosa and cartilage plates and form a nearly complete ring.
The bronchiole in cross section view
The Smooth Muscle
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  • They are involuntarily controlled and their  image descriptionmovement alters the size of the bronchial lumen. The changes in lumen size may increase airflow during normal breathing, protect lungs tissues from foreign particles and irritants, or improve the effectiveness of a cough.
The smooth muscle controls the bronchial lumen
The smooth muscle controls the bronchial lumen
The smooth muscle controls the bronchial lumen
The smooth muscle controls the bronchial lumen
The smooth muscle controls the bronchial lumen
The smooth muscle controls the bronchial lumen
The smooth muscle controls the bronchial lumen
The smooth muscle controls the bronchial lumen
The smooth muscle controls the bronchial lumen animation
  • A narrow band of image descriptionadventitia covers the outer bronchial wall, which connects the bronchus to the surrounding lung tissues.
The bronchiole in cross section view
Adventitia
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Photomicrograph of the bronchial wall:

Components: image descriptionCartilage plateimage descriptionmucosaimage descriptionsmooth muscleimage descriptionlung tissue

Micrograph
Micrograph Cartilage Plate
Micrograph Mucosa
Micrograph Smooth Muscle
Micrograph Tissues
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An Overview of the Bronchial Wall Anatomy:

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Test yourself while observing the Bronchial Wall Structure
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