The alveolar epithelium in the lungs is[1990]a)nonciliated columnarb)nonciliated squamousc)ciliated columnard)ciliated squamousCorrect answer is option 'B'. Can you explain this answer?

Question

Answer

Alveoli main cilia nahi hote hai aur epithelium squamous hota hai thoda NCERT ka bhi yaad rakh lo

Answer

The epithelium/epithellial tissue present on the surface of alvelous /Alveolar sac is squamous type and non cilliated so as to ensure the maximum gasesous exchange because cillia may lead to obstruction during the exchange.

Answer

The alveolar epithelium in the lungs is nonciliated squamous. This means that the cells lining the alveoli, which are the tiny air sacs in the lungs where gas exchange occurs, are thin and flat in shape and do not have cilia.

Here is an explanation of why the correct answer is option 'B':

The alveoli are the functional units of the lungs, where oxygen is taken in and carbon dioxide is released. The alveolar epithelium lines the inner surface of the alveoli and is responsible for facilitating the exchange of gases between the air in the alveoli and the bloodstream.

Nonciliated squamous epithelium refers to a type of tissue composed of flat, thin cells that do not have cilia. Cilia are hair-like structures that can be found on the surface of certain cells, such as those lining the respiratory tract. They have a beating motion that helps to move mucus and debris out of the airways.

In the case of the alveolar epithelium, the cells are thin and flat to allow for efficient gas exchange. The thinness of the cells allows gases to diffuse easily across the epithelium, while the flat shape maximizes the surface area available for gas exchange. This design is essential for the exchange of oxygen and carbon dioxide between the air in the alveoli and the surrounding capillaries.

Additionally, the absence of cilia in the alveolar epithelium is important because the alveoli do not produce mucus or need to move mucus. Instead, their primary function is gas exchange, and the absence of cilia allows for a smoother and more efficient movement of gases across the epithelium.

In conclusion, the alveolar epithelium in the lungs is nonciliated squamous. This type of tissue is thin and flat, allowing for efficient gas exchange, and does not have cilia, as the primary function of the alveoli is gas exchange rather than mucus clearance.

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