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Question
Absence of cartilage, absence of ciliated epithelium, presence of minimal smooth muscles and presence of thin flattened epithelium are the features of which of the following parts of the respiratory system?
Absence of cartilage, absence of ciliated epithelium, presence of minimal smooth muscles and presence of thin flattened epithelium are the features of which of the following parts of the respiratory system?
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Solution
The correct option is D Alveoli
Alveoli are an important part of the respiratory system whose function it is to exchange oxygen and carbon dioxide molecules to and from the bloodstream. The alveoli are very thin, allowing the relatively easy passage of oxygen and carbon dioxide between the alveoli and blood vessels called capillaries. Alveoli are thin-walled, sac-like structures lined by a single layer of flattened squamous epithelial cells.
Alveoli are an important part of the respiratory system whose function it is to exchange oxygen and carbon dioxide molecules to and from the bloodstream. The alveoli are very thin, allowing the relatively easy passage of oxygen and carbon dioxide between the alveoli and blood vessels called capillaries. Alveoli are thin-walled, sac-like structures lined by a single layer of flattened squamous epithelial cells.
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