The diaphragm plays a crucial role in respiratory function as the primary muscle responsible for inhalation. When the diaphragm contracts, it flattens and expands the thoracic cavity, creating a vacuum that draws air into the lungs. During exhalation, the diaphragm relaxes, pushing air out. Its optimal functioning is vital for effective breathing, particularly during physical activity, where increased oxygen intake is necessary. A strong and well-functioning diaphragm supports overall respiratory efficiency and endurance.