The squamous epithelial cells of the alveoli form part of the gas exchange system.
How do these cells assist gas exchange?
1 They contain many mitochondria.
2 They have a large surface area.
3 They provide a short diffusion path.
1 )
1 and 2 only
2 )
1 and 3 only
2 and 3 only
4 )
1, 2 and 3
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