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 ...

Pulmonary arterial hypertension (PAH) is a type of pulmonary hypertension that causes high blood pressure in the small arteries of the lungs. It is a serious condition that can impair blood flow, ...

How does the urinary system work? The urinary system's function is to filter blood and create urine as a waste by-product. The organs of the urinary system include the kidneys, renal pelvis, ureters, ...