The membranes surround the lungs are known as?

RRB Staff Nurse Delhi-2015

Applied Anatomy

Easy

Appeared in: RRB Staff Nurse Delhi-2015

Explanation

The pleura is the correct term for the serous membranes that enclose the lungs.
It consists of two layers: the visceral pleura, which covers the lung surface, and the parietal pleura, which lines the thoracic cavity.
Between these two layers is the pleural cavity, a potential space containing lubricating fluid that allows for frictionless movement during breathing.
This structure is crucial for maintaining lung inflation and facilitating respiratory mechanics.

Option A: The pericardial membrane (pericardium) is the serous membrane that encloses the heart, not the lungs.
Option B: Mediastinal refers to the mediastinum, which is the anatomical region and space in the chest located between the two lungs. It is not a membrane that surrounds the lungs.
Option D: The peritoneal membrane (peritoneum) is the serous membrane that lines the abdominal cavity and covers the abdominal organs.

Visual 1: Diagram - A cross-section of the thoracic cavity showing a lung enclosed by the inner visceral pleura and the outer parietal pleura, with the pleural cavity highlighted. This helps visualize the two-layered structure.
Visual 2: Illustration - An anatomical chart showing the locations of the pleura, pericardium, and peritoneum in the human torso to differentiate their respective locations.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Anatomy of the thoracic cavity and serous membranes as background academic context rather than a clinical decision trigger.
Understanding the pleura is vital for diagnosing and managing conditions like pleurisy (inflammation of the pleura), pleural effusion (fluid accumulation in the pleural cavity), and pneumothorax (air in the pleural cavity, leading to a collapsed lung).
During procedures like thoracentesis (pleural tap), a nurse must know the anatomy of the pleura to assist in safely aspirating fluid from the pleural space without puncturing the lung.
What if? - If a patient sustains a chest injury that allows air to enter the pleural cavity, the negative pressure is lost, and the lung can collapse. This condition, a pneumothorax, is a medical emergency requiring immediate intervention, often with a chest tube, to re-establish negative pressure and re-inflate the lung.

How to Approach the Question

First, identify the key terms in the question: 'membranes' and 'lungs'. This is a direct recall question about anatomy.
Mentally review the major serous membranes of the body and the organs they are associated with.
Evaluate each option: 'Pericardial' relates to the heart (peri- meaning around, cardial meaning heart). 'Peritoneal' relates to the abdomen.
Differentiate between 'Pleural' and 'Mediastinal'. 'Pleural' specifically refers to the lining of the lungs. 'Mediastinal' refers to the space between the lungs.
Based on this anatomical association, conclude that 'Pleural' is the correct term for the membranes surrounding the lungs.

Concept Tested & Keywords

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