Download How we breathe Respiratory

Respiratory
How we breathe
Parts and Pieces
Nose
Trachea
Lungs
Alveoli
Nose
Air enters the nose
Tiny hairs filter out dust and
particles.
Tissues moisten and warm
the air, making it more suited
for the lung environment.
Trachea
 Long tube
delivers air to
the left and
right Bronchi
(wind pipe)
 The Trachea
runs down the
front of your
neck
Lungs
 The largest organ
in the respiratory
system
 You have two.
 One is larger than
the other.
 The right lung has
three lobes and the
left lung has two
lobes. Why????
Alveoli
 Small air sacks
used to transfer o2
and CO2 in an
exchange of gas.
 The Alveoli are
surround by blood
vessels so small
the air can pass
right through the
cell wall.
HOW IT WORKS
 The grapelike arrangement of
alveoli creates an enormous
surface area sufficient for
exchanging enough oxygen and
carbon dioxide for the entire
body.
That’s crazy!
Almost Done
Let us take a look
at a good set of
healthy lungs, shall
we???
Nice lungs
Now, let us look at a
set of lungs from a
smoker.
Tumor that collapse my
fathers lung
Warning
Look away now
pretty gross
stuff
summary

Air (comprised primarily of nitrogen and only about 21%
oxygen) enters the nose, where tiny hairs filter out dust
and particles. Tissues moisten and warm the air, making it
more suited for the lung environment. Air passes from the
pharynx to the larynx (containing two elastic vocal cords)
and into the trachea. The trachea divides into the left and
right bronchi which subdivide into smaller and smaller tubes
called bronchioles. These airways are lined by mucous
membranes and countless cilia which trap and remove
particles from the lungs. Bronchioles open into the alveoli
which are clustered like grapes. Only one cell thick, alveoli
have direct contact with capillaries for gas exchange. The
grapelike arrangement of alveoli creates an enormous
surface area sufficient for exchanging enough oxygen and
carbon dioxide for the entire body.