pleural pressure

Pleural pressure is the pressure within the thin space between the lungs and the chest wall, called the pleural cavity. It helps keep the lungs expanded and prevents them from collapsing. During normal breathing, this pressure is slightly negative compared to atmospheric pressure, creating a pull that keeps the lungs stretched out. When you breathe in, the pressure becomes more negative, pulling air into the lungs. During exhalation or certain health issues, the pressure can change, affecting lung function. Overall, pleural pressure is essential for effortless and effective lung movement during breathing.