Pneumonia is a lung condition where the alveoli become inflamed. This can result in fluid building up in the lungs due to their diminished functionality. This is an informal name for pneumonia ...

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Illustrations by the artist from The Age.

The pleura (plural: pleurae) is a two-layered membrane that covers the lung. Between the layers is a small amount of lubricating fluid, known as pleural fluid, which helps cushion the lung and reduce ...