That which is NOT part of the respiratory membrane of the lungs is:
- A thin layer of ciliated epithelial cells
<h3>What is the respiratory membrane?</h3>
The respiratory membrane is the surface of the lungs where there is an exchange of gases. There are many parts that make up the respiratory membrane of the lungs.
Some of these are; the respiratory mucosa, the adventitia, and the submucosa. The thin layer of ciliated epithelial cells is not a part of the respiratory membrane but is a hair-like structure that helps to remove unwanted substances from the body.
So the correct answer is: a thin layer of ciliated epithelial cells.
Learn more about the respiratory membrane here:
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The expression that represents the difference of squares for this situation is 
Given the generic x by x grid has c blocks moved to create an (x-c) by (x+c) grid, to get the difference of two squares, we will take the product of the expressions as shown:
Hence the expression that represents the difference of squares for this situation is
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