Final answer:
The parietal and visceral pleura are two layers of tissue that surround the lungs. When these layers are damaged, air can accumulate between them, leading to pneumothorax and potential lung collapse.
Step-by-step explanation:
The parietal pleura and visceral pleura are two layers of tissue that surround the lungs. The parietal pleura lines the interior of the thorax, while the visceral pleura covers the surface of the lungs. When either the parietal or visceral pleura is damaged, it can lead to the accumulation of air between them, resulting in a condition known as pneumothorax. Pneumothorax can cause lung collapse and may require medical intervention to remove the trapped air.