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The alveoli of lungs are lined by
- a)Squamous epithelium
- b)Columnar epithelium
- c)Cuboidal epithelium
- d)Simple epithelium
Correct answer is option 'A'. Can you explain this answer?
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Verified Answer
The alveoli of lungs are lined bya)Squamous epitheliumb)Columnar epith...
- The respiratory or gas-exchange surface consists of millions of small sacs, or alveoli, lined by a simple squamous epithelium.
- This epithelium is exceedingly thin to facilitate the diffusion of oxygen and CO2.
- The alveolar walls also contain cuboidal surfactant-secreting cells.
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The alveoli of lungs are lined bya)Squamous epitheliumb)Columnar epith...
The alveoli of lungs are lined by squamous epithelium.
Explanation:
- Alveoli are tiny air sacs in the lungs where gas exchange occurs between the air and blood.
- The walls of alveoli are composed of two main types of cells: type I alveolar cells and type II alveolar cells.
- Type I alveolar cells are thin and flat, and they form the majority of the alveolar wall. They are also known as squamous alveolar cells, because they have a squamous or flattened shape.
- The main function of type I alveolar cells is to provide a thin barrier for gas exchange between the alveolar air and the blood capillaries that surround them.
- Type II alveolar cells are smaller and cuboidal in shape, and they secrete a substance called surfactant, which helps to reduce the surface tension of the alveolar walls and prevent them from collapsing during exhalation.
- In summary, the alveoli of lungs are lined by a single layer of squamous epithelium, which is made up of type I alveolar cells.
Explanation:
- Alveoli are tiny air sacs in the lungs where gas exchange occurs between the air and blood.
- The walls of alveoli are composed of two main types of cells: type I alveolar cells and type II alveolar cells.
- Type I alveolar cells are thin and flat, and they form the majority of the alveolar wall. They are also known as squamous alveolar cells, because they have a squamous or flattened shape.
- The main function of type I alveolar cells is to provide a thin barrier for gas exchange between the alveolar air and the blood capillaries that surround them.
- Type II alveolar cells are smaller and cuboidal in shape, and they secrete a substance called surfactant, which helps to reduce the surface tension of the alveolar walls and prevent them from collapsing during exhalation.
- In summary, the alveoli of lungs are lined by a single layer of squamous epithelium, which is made up of type I alveolar cells.
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The alveoli of lungs are lined bya)Squamous epitheliumb)Columnar epith...
For exchange of gases thin covering are required so simple squamous are used in alveoli
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The alveoli of lungs are lined bya)Squamous epitheliumb)Columnar epitheliumc)Cuboidal epitheliumd)Simple epitheliumCorrect answer is option 'A'. Can you explain this answer?
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