Download The Respiratory System

Walk-In
• Take out notebook, folder, pencil
box.
• Take out respiratory diagram from
yesterday.
• Read over the labels we already
did and try to guess the remaining
labels.
Diagram
• Follow along as we complete the diagram of
the organs.
Today’s Learning Target
• Learn the function of each respiratory organ
by viewing this presentation on the class
webpage.
• Take notes in your slide guide.
• Heads-up: The quiz on Friday is an opennotes quiz! You may use your diagram, notes
you take today, and notes you do on Friday
when you do the quiz! 
Watch Brainpop:
Respiratory System &
Asthma
Lungs
• Lungs help the body
breathe.
• The upper part of the
chest is almost filled with
lungs.
• Lungs can hold about as
much air as a basketball!
Lungs Working With the Heart
• Lungs trade air with blood. The heart
pumps used blood to the lungs. The
lungs take the carbon dioxide and
other things that the body cannot use
out of the blood.
• The lungs add oxygen to the blood.
• After the trading is done, the blood
goes back to the heart to be pumped
to the body to deliver oxygen to the
cells.
What makes up the respiratory system?
1.
Lungs
4. Alveoli
• you have two lungs.
• Tiny air sacs at the tips of the
• the lung on the left side of
bronchial tubes
your body is a bit smaller than
• Lungs contain over 600 million
the lung on the right. This
alveoli
extra space on the left leaves
• Each alveoli is surrounded by
room for your heart.
capillaries
• Your lungs are protected by
5. Diaphragm
your rib cage
• Beneath the lungs is the
2. Trachea
diaphragm, a dome-shaped
•
Windpipe that delivers oxygen
muscle that works with your
to lungs
lungs to allow you to inhale
3. Bronchi / Bronchial tubes
(breathe in) and exhale
• The windpipe breaks off into
(breathe out) air.
two tubes called bronchi. The
bronchi branch off like a tree
into bronchial tubes
Draw
bronchi
and
label
this
diagram,
using
your
“slide
guide”
to help
you!
trachea
alveoli
bronchioles
diaphragm
How do Alveoli
work????
When you breath in, your
lungs expand and take in
oxygen. This oxygen goes
straight to your alveoli.
The capillary that
surrounds the alveoli
picks up that oxygen and
drops off carbon dioxide
to be exhaled.
How does the Diaphragm work????
When your diaphragm pulls down, it
not only leaves more space for the
lungs to expand but also lowers the
internal air pressure. Outside, where
the air pressure is greater, you suck
in air in an inhale. The air then
expands your lungs like a pair of
balloons. When your diaphragm
relaxes, the cavity inside your body
gets smaller again. Your muscles
squeeze your rib cage and your lungs
begin to collapse as the air is pushed
up and out your body in an exhale.
True or False?
We inhale because the air pressure
inside the chest cavity is less than
outside the body.
T
The lungs are composed of hundreds
of tiny air sacs called alveoli.
T
Oxygen is absorbed into the
bloodstream in the trachea.
F
The bronchial tubes branch off from
the trachea into an upside down Y.
T
Watch the movie!