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Respiratory System
By:
Emily Gretak, Emily Schneider,
and Mollee Pezold
Inhaling and Exhaling
• When you breathe in the
muscles of your
diaphragm contract and
the diaphragm is pulled
downward.
• While this is going on, the
rib muscles pull the ribs
up and out. Your chest
expands and so do your
lungs. Then the opposite
happens when you
breathe out.
Air’s Trip Through the Trachea
• To begin, you breathe in
through your nose or
mouth and the air goes to
the larynx. If you are
talking, your vocal cords
come together to make
sound. If not, the air
passes to the trachea.
From there, the trachea
separates into to
bronchial tubes and it’s to
the lungs!
Air’s Trip Into the Lungs
• When the air that you have just breathed in
reaches the lungs, it spreads into many, many
small bronchial tubes. At the end of each of
these bronchial tubes there are tiny air sacs. The
air goes into them and from then it is sent into
the blood stream. The carbon dioxide from the
blood is sent into the air sacs and then you
breathe out all of the carbon dioxide. After this
you breathe in again and the process is
repeated, over and over and over.
Things that Harm the Lung
• There are many
diseases that can
harm the lung such
as; asthma,
pneumonia,
• tuberculosis, lung
cancer, chronic
bronchitis,
emphysema, choking,
and the number one
is SMOKING!
Diseased Lungs
• The lung is unhealthy
or diseased when a
person is having
difficulty breathing, a
bluish color around
the mouth, inside the
lips, or on fingernails.
This indicates lack of
oxygen.
How to Keep it Healthy
• You can keep the
respiratory system
healthy by; not
working in dusty
shops, factories,
mines, not breathing
high amounts of
foreign substances,
and by NOT
SMOKING!
Sources
• All About the Human
Body
• ABC’s of the Body
• www.kidshealth.com
• www.google.com
• ADAM
• Encarta
• www.brainpop.com