When breathing, air enters the nasal cavity, where it begins to warm up, moisten, disinfect and cleanse. Then it enters the nasopharynx, passes through the larynx, descends the trachea and enters the bronchi.
Further, the bronchi branch out into bronchioles, which end in clusters of pulmonary vesicles that form the bulk of the lungs. In them, oxygen passes into the blood.
Since the organs of the respiratory system end in the chest, it can be said that air does not pass through the lower body.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.