Dust particles can enter the respiratory system through inhalation and cause damage to the lungs. The respiratory system's primary function is to bring oxygen to the body and eliminate carbon dioxide.



Once dust particles enter the respiratory system, the body has several mechanisms to remove them.



The first line of defense is coughing and sneezing. When dust particles irritate the airways, the body responds by coughing or sneezing to expel them.



The respiratory system also has a mucociliary system, which is a combination of mucus and tiny hair-like structures called cilia. The mucus traps dust particles, and the cilia move the mucus up to the throat, where it is swallowed or coughed up.



Macrophages are specialized cells in the lungs that engulf and digest foreign particles, including dust. They are the second line of defense and play a crucial role in the immune response.



If the dust particles are too large or numerous to be removed by coughing, sneezing, or the mucociliary system, the immune system may be activated. White blood cells called lymphocytes and neutrophils are sent to the lungs to attack the particles. This response can cause inflammation, which can lead to coughing, wheezing, and shortness of breath.



In summary, the respiratory system has several mechanisms to remove dust particles, including coughing and sneezing, the mucociliary system, macrophages, and the immune response. It is essential to protect the respiratory system from dust particles by wearing masks and avoiding exposure to dusty environments.

Air contains many gases and it also contains dust .In nose, there is cillia present this helps nose by sticking it on it and after when we exhale, the dust is taken away by the exhaled air and is thrown out