Respiratory System

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Respiratory System
Function of the Lungs


Supplies oxygen to the
blood by inhaling. This
oxygen is then carried
to all the cells of the
body.
Removes carbon
dioxide (a waste gas)
from the cells and
release it outside the
body. This is done
when you exhale.
Facts about the lungs
 In the cells the oxygen
being delivered
combines with nutrients
to provide energy that
the cells can use.
 The carbon dioxide that
you breathe out is
absorbed by the plants
and converted back into
oxygen.
What makes up the
respiratory system?
 Trachea: Windpipe that
directs air to the lungs
 Bronchi: passages
through which air enters
the lungs
 Alveoli: microscopic air
sacs in the lungs which
allow the exchange of
O2 and Co2
 Diaphragm: muscle that
contracts and relaxes to
allow the lungs to
breathe.
Common Problems
 Bronchitis: swelling of
the bronchi caused by a
virus or bacteria causing
coughing, fever, and
chest tightness.
 Asthma: an inflammatory
disease that causes the
bronchi to become
blocked or narrowed.
 Pneumonia: is a lung
infection caused by
viruses or bacteria.
Common Cancers
 Emphysema: a
disease in which the
alveoli are damaged
or destroyed.
 Lung Cancer: a
disease in which
tissues of the lung
are destroyed by the
growth of a tumor.
Caring for your lungs
 Stay Active: regular
activity strengthens your
lungs and helps keep
parts of the respiratory
clear. It also
strengthens your
diaphragm.
 Avoid smoking and
secondhand smoke: All
types of tobacco
increase your risk of
respiratory diseases.
Healthy Vs. sick
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