Pleural membranes

Pleural Membranes are thin sheets of tissue that line the chest cavity and cover the lungs. They are part of the respiratory system and play a crucial role in respiration. The pleural membranes consist of two layers: the visceral pleura, which is attached to the surface of the lungs, and the parietal pleura, which lines the chest wall.

Structure

The pleural membranes are made up of two layers. The inner layer, known as the visceral pleura, is attached directly to the lungs. The outer layer, known as the parietal pleura, is attached to the chest wall. Between these two layers is a thin space known as the pleural cavity, which is filled with a small amount of pleural fluid. This fluid acts as a lubricant, allowing the two layers of the pleural membrane to slide against each other without friction during respiration.

Function

The main function of the pleural membranes is to assist in the process of respiration. The pleural fluid within the pleural cavity allows the lungs to expand and contract smoothly during breathing. In addition, the pleural membranes help to create a closed system within the chest cavity, which helps to maintain the pressure needed for respiration.

Clinical significance

Diseases and conditions that can affect the pleural membranes include pleurisy, pleural effusion, and pneumothorax. Pleurisy is an inflammation of the pleural membranes, while pleural effusion is a condition in which excess fluid builds up in the pleural cavity. Pneumothorax is a condition in which air or gas accumulates in the pleural cavity, causing the lung to collapse.

See also

• Respiratory system
• Lung
• Pleural cavity
• Pleural fluid
• Pleurisy
• Pleural effusion
• Pneumothorax

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