Histology Flashcards

1
Q

What is the general histology of the upper airways?

A
  1. Ciliated pseudostratified columnar epithelium
  2. Bronchus associated lymphoid tissue
  3. Supported by cartilage and smooth muscle
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2
Q

What is the blood supply to the upper airways?

A

Dual blood supply: pulmonary and bronchial arteries

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3
Q

What are the roles of each cell type in the upper airways?

A
  1. Ciliated cells - mucociliary escalator
  2. Goblet cells - mucus production
  3. Basal cells - pluripotent reserve cell
  4. Neuroendocrine cells - chemoreceptors
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4
Q

What is the main component of the bronchiole?

A

Muscle for dilation and constriction

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5
Q

What are the two types of cells in the alveoli?

A
  1. Type I pneumocyte (90%) - thin and flat

2. Type II pneumocyte (5%) - surfactant

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