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Which of the following is present in the alveoli of lungs?
  • a)
    Simple columnar epithelium
  • b)
    Simple cuboidal epithelium
  • c)
    Simple squamous epithelium
  • d)
    Sensory epithelium
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
Which of the following is present in the alveoli of lungs?a)Simple col...
Simple squamous epithelium is present in the alveoli of the lungs.

- The alveoli are the tiny air sacs in the lungs where the exchange of gases, oxygen, and carbon dioxide occurs between the air and the blood.
- The walls of the alveoli are made up of a single layer of cells known as the alveolar epithelium.
- This epithelium is composed of simple squamous epithelial cells.

Simple squamous epithelium is a type of epithelial tissue that is composed of a single layer of thin, flattened cells. It is well-suited for diffusion and filtration processes due to its thin and permeable nature.

- In the alveoli, the simple squamous epithelial cells are extremely thin, allowing for efficient gas exchange.
- The thinness of these cells reduces the diffusion distance between the air in the alveoli and the blood capillaries, facilitating the rapid exchange of gases.
- The simple squamous epithelium also allows for the easy passage of oxygen from the alveoli into the bloodstream and the removal of carbon dioxide from the bloodstream into the alveoli.

Simple squamous epithelium is also found in other locations in the body, such as the lining of blood vessels (endothelium) and the serous membranes that line the body cavities (mesothelium).

In conclusion, the presence of simple squamous epithelium in the alveoli of the lungs facilitates efficient gas exchange by allowing for rapid diffusion of gases across the thin epithelial layer.
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Community Answer
Which of the following is present in the alveoli of lungs?a)Simple col...
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 diffusion  of oxygen and CO2. The alveolar walls also contain cuboidal surfactant - secreting cells.
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Which of the following is present in the alveoli of lungs?a)Simple columnar epitheliumb)Simple cuboidal epitheliumc)Simple squamous epitheliumd)Sensory epitheliumCorrect answer is option 'C'. Can you explain this answer?
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