SSC MTS EXAM

Detailed explanation-1: -Upon inhalation, the diaphragm contracts and flattens and the chest cavity enlarges. This contraction creates a vacuum, which pulls air into the lungs. Upon exhalation, the diaphragm relaxes and returns to its domelike shape, and air is forced out of the lungs.

Detailed explanation-2: -In exhalation, the diaphragm moves upward and the chest wall muscles relax, causing the chest cavity to get smaller and push air out of respiratory system through the nose or mouth.

Detailed explanation-3: -During exhalation, ribs move down and inwards, while diaphragm moves upwards and relaxes. This reduces the size of the chest cavity and the air is expelled out of the lungs through a process called exhalation.