inandningsfasen

The inandningsfasen, often translated as the inhalation phase or inspiratory phase, refers to the initial part of the breathing cycle where air is drawn into the lungs. This process is driven by a decrease in pressure within the thoracic cavity, which causes the lungs to expand and fill with air. Key muscles involved in normal, quiet inhalation include the diaphragm, which contracts and flattens, and the external intercostal muscles, which lift the ribs upwards and outwards. This action increases the volume of the chest cavity, creating a lower pressure gradient that pulls air from the atmosphere into the lungs through the airways. Accessory muscles can also be recruited for more forceful inhalation, such as during exercise or respiratory distress. The inandningsfasen is a crucial and active process that ensures the body receives the oxygen necessary for metabolic functions. Following inhalation, the exhalation phase begins, where air is expelled from the lungs.