As you know breathing couldn’t
happen without the help from the respiratory system, including the nose,
throat, voice box, windpipe and lungs.
With each breath you take in air through your nostrils and mouth, with
your lungs filling up and emptying out as air is inhaled, the mucous membranes
of the nose and mouth warms and humidify the air. Normally in today’s modern environment, with
cities and towns so polluted, your respiratory system have a mammoth task of filtering
out foreign matters and organisms that enter through the nose and mouth. Pollutants that are breathed or coughed out
or destroyed by the digestive juices or eaten by the macrophages, a type of
blood cell that patrols the body looking for germs to destroy when they are
encountered inside the body.
Tiny hairs called cilia in
the trachea is an important protective mechanism of the body and protect the
nasal passageways and other parts of the respiratory tract by preventing them
from becoming lodged in the lungs, and their job is to filter out dust and
other particles that enter the nose with the breathed air. As the air is inhaled, the cilia job is to move
back and forth, pushing any foreign matter like dust away from the lungs with a
coordinated sweeping action towards the nostrils where it is blown out or
towards the pharynx where it travels through the digestive system and out with
the rest of the body’s waste. If the
cilia fails in its duty to function, foreign bodies starts to grow bacteria
that remain in the airway. Bacteria
built up in the trachea cause breathing problems, infections and other
disorders.
cont'd..
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