Which is true about the pleural sac? it is continuous with the atmosphere and protects the lungs from infection. it is a closed sac surrounding each lung and contains a large volume of surfactant. it is a closed, air-filled space surrounding both lungs that has a negative pressure compared to atmospheric pressure. it is bounded by pleural membranes that are very thin, which allows for abundant gas exchange. it is a closed sac surrounding each lung that contains only a tiny volume of lubricating fluid?

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Lydia Osborne

27 July, 21:37

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Lillie Oconnell · Answer 1

The pleural sac is a closed sac surrounding each lung and contains only a small amount of serfactin to allow for movement.