Question

explain the working of human air

Answer 1

The primary organs of the respiratory system are the lungs, which functionto take in oxygen and expel carbon dioxide as we breathe. The gas exchange process is performed by the lungs and respiratory system. Air, a mix of oxygen and other gases, is inhaled

Answer 2

In humans and other higher animals the exchange of gases is carried out by the respiratory system. We can divide the respiratory system into two parts i.e. the air passageway and the lungs.

Human Air Passageway:

The air passageway consists of the parts through which the outside air comes in the lungs and after the exchange of gases it goes out. Air passage ways consist of nostrils, nasal cavities, pharynx,larynx, trachea, bronchi, bronchioles and alveolar ducts which ultimately lead into the alveolar sac. Air passageway opens to exterior via opening called nostrils. Nasal cavities are lined withmucous membrane of ciliated epithelium. Each nasal cavity is subdivided into three passage ways by the projection of bones from the walls of theinternal nose. Nasal cavities perform the following functions:

Air enters the nasal cavity through nostril.The large dust particles are, trapped by the hair present in the nasal cavities.Air while passing through the nasal cavity, becomes moist, warm and filtered of smaller foreign particles by mucous membrane.