Pronunciation: [plˈɜːɹəz] (IPA) 
The word "Pleuras" is spelled as /plʊˈræs/ in International Phonetic Alphabet (IPA). The first syllable 'pleu' is pronounced as /plʊ/, where the 'u' and 'e' together form the sound of 'short u'. The second syllable 'ras' is pronounced as /ˈræs/, where the 'a' is pronounced as 'short a'. Therefore, the correct spelling of this word is important for accurately communicating about the thin membranes that line the lungs and chest cavity.
The pleurae refer to the paired serous membranes that line the thoracic cavity and envelope the lungs. Specifically, they consist of two layers, the visceral and parietal pleura, which contribute to the protection and functioning of the respiratory system. The visceral pleura adheres closely to the surface of the lungs, conforming to their shape, while the parietal pleura lines the inner surface of the thoracic wall and mediastinum.
The pleurae serve several essential roles in maintaining the integrity and functionality of the lungs. Firstly, they produce a thin layer of serous fluid that lubricates the lung surface, facilitating smooth movement during respiration. This fluid reduces friction between the pleurae, allowing the lungs to effortlessly expand and recoil with each breath. Secondly, the pleural membranes create a sealed pleural cavity, which creates negative pressure and contributes to lung inflation. This pressure differential between the pleural and lung cavities helps maintain lung expansion by preventing lung collapse.
Pleural disorders, such as pleurisy or pleural effusion, can interfere with the normal functioning of the pleurae. Pleurisy refers to the inflammation of the pleurae, resulting in pain and difficulty breathing. Pleural effusion, on the other hand, involves an abnormal accumulation of fluid in the pleural cavity, which can compress the lungs and lead to respiratory distress. Prompt medical intervention is crucial in such cases to alleviate symptoms and potentially resolve the underlying cause.
The word "pleuras" is derived from the Greek term "pleura" (πλευρά), which means "rib". In ancient Greek, it referred to the side or flank of the body, particularly in relation to the chest area. Over time, this term was adopted in medical terminology to specifically refer to the outer lining of the lungs, known as the pleura.
