Definition

1. Noun:
   • A thin serous membrane: The pleura is a thin, double-layered membrane that lines the thoracic cavity and envelops each lung. Its primary function is to facilitate smooth lung movement during respiration and to create a sealed, fluid-filled space.

Usage

• The word "pleura" is a singular noun. Its standard plural form is pleurae.
• It is a specialized anatomical term used primarily in medical, biological, and health science contexts.
• It is typically used with a definite article ("the") and is often modified by adjectives specifying location (e.g., parietal, visceral).

Examples

• Noun:
  • Inflammation of the pleura is called pleurisy.
  • The surgeon carefully examined the visceral pleura covering the lung's surface.
  • A small amount of fluid in the pleural space acts as a lubricant.

Advanced Usage

• "Parietal pleura": Refers to the outer layer of the pleura, which is attached to the chest wall and diaphragm.
  • The parietal pleura is sensitive to pain.
• "Visceral pleura": Refers to the inner layer of the pleura, which is firmly attached to the surface of the lungs themselves.
  • The visceral pleura directly covers the lung tissue.
• "Pleural cavity/space": The potential space between the parietal and visceral pleurae, containing a small amount of lubricating pleural fluid.
  • Air or fluid can accumulate in the pleural cavity, causing complications.

Variants and Related Words

• Pleural (adj): Of or relating to the pleura.
  • Pleural effusion is a condition involving excess fluid in the pleural space.
• Pleurisy (n): Inflammation of the pleura, often causing painful breathing.
  • His cough and chest pain were diagnosed as pleurisy.
• Pleurae (n): The standard plural form of "pleura".

Synonyms

• Serous membrane (of the thorax): A more general descriptive term.
• Pleural membrane: A synonymous phrase.

Notes on Different Meanings

• The word "pleura" has a single, specific meaning in modern English usage, referring exclusively to this anatomical structure. It does not have common metaphorical or non-medical meanings.

Noun

1. the thin serous membrane around the lungs and inner walls of the chest