The term "cavum pleurae" is a medical term used to refer to the space between the lungs and the chest wall. To understand the spelling of this term, it is important to know that it derives from Latin. "Cavum" (IPA: ˈkɑːvʊm) means "cavity," and "pleurae" (IPA: ˈplʊəri) means "pleura", referring to the protective membranes surrounding the lungs. The spelling emphasizes the double 'u' in "cavum" to differentiate it from the singular "cavus," and the final 'e' in "pleurae" reinforces the Latin plural ending.
Cavum pleurae, also known as the pleural cavity or pleural space, is a anatomical term used in the medical field to describe a potential space located between the two layers of the pleura, which are thin membranes that cover the lungs and line the inside of the chest cavity.
The pleural cavity is essentially a small, fluid-filled compartment that is formed by the two layers of pleura, namely the parietal pleura and the visceral pleura. The parietal pleura lines the inner surface of the chest wall, while the visceral pleura covers the lungs. The cavum pleurae surrounds the lungs, creating a sealed environment.
The primary function of the cavum pleurae is to facilitate smooth and effortless movement of the lungs during respiration. This is achieved by the thin layer of fluid present within the pleural cavity, known as pleural fluid. The fluid acts as a lubricant, reducing friction between the lung surfaces and the chest wall as the lungs expand and contract during breathing.
In addition to its role in lung movement, the cavum pleurae also allows for pressure changes within the thoracic cavity. This assists in lung inflation and deflation, enabling efficient gas exchange during respiration.
Pathological conditions such as pleural effusion or pneumothorax can disrupt the normal functioning of the cavum pleurae. Pleural effusion is the accumulation of excess fluid within the pleural cavity, whereas pneumothorax involves the presence of air in the pleural space. These conditions can cause breathing difficulties and may require medical intervention.
Pleural cavity.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
The word "cavum pleurae" is not a single word, but rather a combination of two Latin words: "cavum" and "pleurae". Here is the etymology of each:
1. Cavum: The word "cavum" comes from the Latin noun "cavus" meaning "hollow" or "cavity". It is derived from the Proto-Indo-European root "ḱaup-", meaning "to be hollow" or "to arch", which is also the origin of the English word "cave" and other related words.
2. Pleurae: The word "pleurae" is the plural form of the Latin noun "pleura", which means "rib" or "side" in Latin.