Breathing In Apr 2026

: As volume increases, the air pressure inside the lungs decreases below atmospheric pressure.

: The diaphragm (a dome-shaped muscle) contracts and moves downward. breathing in

: The external intercostal muscles contract, pulling the rib cage upward and outward. : As volume increases, the air pressure inside

"Breathing in," or , is the active phase of the respiratory cycle where air is drawn into the lungs. This process is driven by muscular contraction that creates a pressure gradient between the atmosphere and the chest cavity. Key Features of Inhalation : As volume increases