What role does the diaphragm play during respiration?

The diaphragm is a crucial muscle in the respiratory system, and its primary role is to contract and relax, which facilitates breathing. During inhalation, the diaphragm contracts and moves downward, increasing the volume of the thoracic cavity. This decrease in pressure allows air to flow into the lungs. Conversely, during exhalation, the diaphragm relaxes and moves upward, reducing the thoracic cavity's volume and pushing air out of the lungs. Understanding this mechanism highlights the diaphragm's essential function in the breathing process, making it integral to effective respiration and overall respiratory health.