The pulmonary pleura illustration shows the structure of the pleural membrane that surrounds and protects the lungs inside the chest cavity. First, the pleura is a thin membrane that plays an important role in the respiratory system. In addition, it allows the lungs to move smoothly during breathing.
The pulmonary pleura is composed of two main layers. On one hand, the visceral pleura directly covers the surface of the lungs. On the other hand, the parietal pleura lines the inner wall of the chest cavity.
Between these two layers, there is a small space called the pleural cavity. Moreover, this cavity contains a small amount of pleural fluid. Because of this fluid, the pleural layers can slide smoothly during breathing movements.
During inhalation, the lungs expand inside the chest. Then, the pleurae of the lungs allow this movement to occur with very little friction. As a result, the lungs increase in volume to receive oxygen.
Meanwhile, during exhalation, the lungs contract and release carbon dioxide from the body. Therefore, the pleura supports the natural movement of the lungs throughout the breathing cycle.
Furthermore, the pulmonary pleura also has an important protective role. For example, it helps keep the lungs in their proper position within the chest cavity. Likewise, it helps prevent lung collapse.
The pleural fluid also reduces friction between the pleural layers. For this reason, the lungs can move easily inside the chest.
In conclusion, the pulmonary pleura illustration helps explain how this membrane protects the lungs and facilitates their movement during breathing.