I believe it’s the first option
The epithelium is a type of body tissue that forms the covering on all internal and external surfaces of your body.
<h3>
The lining of the air sacs in the lungs (alveoli) is comprised of what epithelium?</h3>
Simple squamous epithelium contain the air sacs or alveoli of the lungs. This kind of squamous epithelial cells are slightly porous which allows the oxygen from the air to enter the blood in the capillaries of the lung. So the squamous epithelium is the epithelium in which the lining of the air sacs or alveoli occurs. Each alveolus is lined by the squamous epithelium.
So we can conclude that: The epithelium is a type of body tissue that forms the covering on all internal and external surfaces of your body.
Learn more about Lungs here: brainly.com/question/2619922
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the answer should be the biosphere
it must be the policy of the United States to support free people who are resisting attempted subjugation by armed minorities or by outside pressures.
Answer:
Atoms containing the same numbers of protons and different numbers of neutrons are <u>isotopes</u>.