Pleura

Negative pressure (suction) causes the visceral pleura to remain in contact with the parietal pleura, so that when the chest wall & parietal pleura move, the parietal pleura takes the visceral pleura and lungs with it.

 Aspiration of any fluid from the pleural cavity is called paracentesis thoracis
 It is usually done in the eighth intercostal space in the midaxillary line
 The needle is passed through the lower part of the space to avoid injury to the principal neurovascular bundle, i e vein, artery and nerve