Which pleura is located just deep to the thoracic wall?

Which pleura is located just deep to the thoracic wall?

• A. Visceral pleurae
• B. Parietal pleurae
• C. Pleural cavity
• D. Right lung

Answer: (B)

The parietal pleura is the correct response because it lines the inner surface of the thoracic wall, covering the diaphragm and thoracic cavity. This layer is crucial as it provides a protective barrier and serves as a surface for the lungs to expand against during breathing. It is also richly innervated, which contributes to the sensation of pain in certain thoracic conditions.

In contrast, the visceral pleura covers the lungs themselves, creating an envelope around each lung. The pleural cavity refers to the space between the visceral and parietal pleura, which contains pleural fluid that reduces friction during respiratory movements. The right lung, while an essential component of the respiratory system, does not play a role in identifying the layer of pleura associated with the thoracic wall. Thus, the parietal pleura's specific position and function in relation to the thoracic wall clearly establish its significance in this context.