When you exhale, __________ A. The diaphragm expands and the chest goes up B. The diaphragm contracts and the chest goes up C. The diaphragm expands and the chest goes down D. The diaphragm contracts and the chest goes down
When the lungs exhale, the diaphragm relaxes, and the volume of the thoracic cavity decreases, while the pressure within it increases. As a result, the lungs contract and air is forced out.
