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the pleural sac or pleural membrane maintains the negative pressure that is in your lungs. negative pressure inside the lungs is very important since it allows atmospheric air to enter your lungs each time you inhale, much like a suction. the pleural sac also allows your lungs to expand easily since it contains a lubricant called pleural fluid.

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15y ago
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15y ago

The pleura is lubricating fluid that keeps everything running smoothly.

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10y ago

Pleura

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9y ago

Oblock

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Q: What is the function of the pleural sac the thing that surrounds your lungs?
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