Which muscles assist the diaphragm during deep respiration?

The intercostal muscles play a crucial role in assisting the diaphragm during deep respiration. These muscles are located between the ribs and are primarily responsible for the expansion and contraction of the rib cage. During deep inhalation, when there is an increased demand for air intake, the diaphragm contracts and moves downward. Simultaneously, the intercostal muscles contract to elevate the ribs, further expanding the thoracic cavity. This coordinated action increases lung capacity, allowing for greater volume of air to be drawn into the lungs.

While other muscles in the body can contribute to respiration in various ways, the intercostal muscles are specifically aligned with enhancing the action of the diaphragm during deeper breaths, making them essential for effective pulmonary ventilation during strenuous activity or deep breathing.