Breathing is the process of inhaling oxygen and exhaling carbon dioxide. It is an important process for human life and other living organisms. Breathing occurs due to the work of the respiratory system, which includes the lungs, bronchi, trachea and nasopharynx. During inhalation, the diaphragm and intercostal muscles contract, which leads to the expansion of the chest and the inhalation of air into the lungs. During exhalation, the diaphragm and intercostal muscles relax, which leads to ches...
