Breathing is the process of absorbing oxygen with the help of special organs. Mammals have a respiratory system that consists of many parts. First, air enters the airways – the nasopharynx and trachea. The respiratory section of the lungs begins with the bronchi, where gas exchange takes place. Its main part proceeds in the lungs, which are the main organs of the respiratory system. therefore, the respiratory system of mammals is called the pulmonary.
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