Question

Do Lungs have positive or negative pressure?

Answer 1

Explanation with a diagram:

Inhalation: During inspiration, intrapulmonary pressure is negative, allowing outside air to enter, and during expiration, intrapulmonary pressure becomes positive due to a decrease in pulmonary volume.

1. This forces the air out into the lungs.

Exhalation: Even when exhaling, the pressure inside the pleural cavity around the lungs is always negative, that is, less than atmospheric pressure.

1. It protects the lungs from rupture; Otherwise, if it is higher, all the air will move to the area of ​​low pressure.

Diagram:

Final answer: The Lungs Have Positive pressure during exhalation and Negative Pressure during inhalation.