it are the entering of air that is made warm,damp,and clean of unknown particles.
Answers
The respiratory system has built-in methods to prevent harmful substances in the air from entering the lungs. Hairs in your nose help filter out large particles. Microscopic hairs, called cilia, are found along your air passages and move in a sweeping motion to keep the air passages clean. But if harmful substances, such as cigarette smoke, are inhaled, the cilia stop functioning properly, causing health problems like bronchitis. Mucus produced by cells in the trachea and bronchial tubes keeps air passages moist and aids in stopping dust, bacteria and viruses, allergy-causing substances, and other substances from entering the lungs. Impurities that do reach the deeper parts of the lungs can often be moved up via mucous and coughed out or swallowed.
Air-conditioning that is heated, moist, and clean of particles unknown is:
- Air enters the respiratory system through the nose or mouth.
- When it enters the nose (also called nares), the air is warm and moist.
- The tiny hairs called the cilia protect the nasal passages and other parts of the respiratory tract, filtering dust and other particles that enter the nose through air.
- The incoming air is heated, moistened, and purified by unknown particles.
- Next, air flows down the windpipe, bronchi, bronchioles, and alveoli.
- The trachea is an empty tube that serves as a passage of air into the lungs.
- Bronchi are two branch tubes that connect the larynx to the lungs.
- Bronchioles are like hair.