What kind of pressure is created in the lungs during exhalation?

During exhalation, positive pressure is created in the lungs, which facilitates the expulsion of air from the respiratory system. This process occurs as the diaphragm and intercostal muscles relax after inhalation, allowing the thoracic cavity to decrease in volume. As the volume of the lungs decreases, the air pressure within the lungs increases above the atmospheric pressure. This difference in pressure drives air out of the lungs and into the atmosphere. Positive pressure is essential for effective respiration, as it ensures that air flows out when the respiratory muscles contract and relax appropriately during the breathing cycle.