The terms "pleural" and "pleura" relate to the membrane lining the lungs and chest cavity, but they function as different parts of speech. Understanding the difference between the two is important for discussing lung anatomy and conditions.
Pleura: The Noun
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Definition: Pleura refers to the serous membrane itself. It's a noun, specifically referring to the two layers:
- Visceral pleura: The inner layer that tightly wraps around the lungs, so much so that it cannot be separated from the lung tissue.
- Parietal pleura: The outer layer that lines the inside of the chest wall.
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Function: The pleura's primary function is to create a smooth, lubricated surface that allows the lungs to expand and contract within the chest cavity with minimal friction.
Pleural: The Adjective
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Definition: Pleural is an adjective that describes something that is related to or associated with the pleura.
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Examples:
- Pleural space: This is the very thin space between the visceral and parietal layers of the pleura. According to the provided reference, this space contains pleural fluid, which provides lubrication between the two layers of pleura.
- Pleural fluid: This liquid is found in the pleural space and aids in frictionless lung movement.
- Pleural diseases: Diseases affecting the pleura, such as pleurisy (inflammation of the pleura).
- Pleural effusion: The buildup of excess fluid in the pleural space.
Summary Table
| Term | Part of Speech | Definition | Example |
|---|---|---|---|
| Pleura | Noun | The serous membrane lining the lungs and chest cavity (visceral and parietal layers) | "The pleura surrounds the lungs." |
| Pleural | Adjective | Relating to or associated with the pleura | "The pleural space contains fluid." |
Key Takeaway
- Pleura is the name of the membrane itself (both layers).
- Pleural is used to describe something that is related to the pleura.
In essence, "pleura" is the thing and "pleural" is the descriptor for anything associated with the pleura.
