What happens to your diaphragm during inhalation?

During inhalation, the diaphragm contracts, which is a crucial part of the breathing process. When the diaphragm contracts, it moves downward, increasing the volume of the thoracic cavity. This increase in volume causes a reduction in pressure within the lungs compared to the atmospheric pressure outside, allowing air to flow in.

Additionally, this contraction may also assist in expanding the lungs further as the rib cage lifts and the intercostal muscles engage, contributing to the overall increase in thoracic volume. This process is essential for effective ventilation, as it allows for adequate oxygen intake and carbon dioxide removal from the body.

The other options do not accurately describe the physiological process occurring during inhalation, as one involves relaxation or remaining unchanged, neither of which facilitates the necessary airflow into the lungs.