1. The
Respiratory System

2. Respiratory Intro
The respiratory system helps you breath in and out, so oxygen (02) can be pumped through your body and carbon dioxide (CO2) can be removed from the blood stream. The respiratory system is made up of many different organs.

3. Respiratory Overview Picture
Nasal Cavity
Nose
Mouth
Bronchus
Bronchiole
Alveoli
Diaphragm
Throat
(pharynx)
Windpipe (Trachea)
Left lungs
Ribs

4. The Nose and Mouth This is where it all begins.
This is where the oxygen first
enters your body and also where
Carbon Dioxide leaves.

5. The Nose and Mouth When the air comes into your nose it gets
filtered by tiny hairs called cilia and it is moistened
by the mucus that is in your nose.
Your sinuses also help out with your
Respiratory System. They help to moisten
and heat the air that you breath.
Air can also get into your body through your
mouth/oral cavity but air is not filtered as
much when it enters in through your mouth.

6. Nose and Mouth Picture Nasal Cavity Nostril Oral Cavity Pharynx
Lleft lung
trachea

7. The Pharynx and Trachea
Next we will head down to your pharynx
(throat) and your trachea (windpipe).
This is where the air passes from your
nose to your bronchi tubes and lungs.

8. The Pharynx and Trachea
(Throat)
Mouth
Trachea
Your pharynx (throat) gathers air after it passes
through your nose and then the air is passed down to
your trachea (windpipe).
Your trachea is held open by “incomplete rings
of cartilage.” Without these rings your trachea
might close off and air would not be able to get
to and from your lungs.

9. Where are We? Nasal Passage Tongue Pharynx We are here. Bronchi Tubes
Alveoli (air-sacs)
Thin-walled blood vessels called capillaries
Very thin cells line the alveoli so that O2 and CO2 can pass in and out of the blood.
Bronchioles pass air to and from your alveoli.
The Trachea is held open by partial rings of cartilage.
Tongue
Pharynx
Where are We?
We are here.

10. The Bronchi Tubes and Bronchiole Intro
Your trachea (windpipe) splits up into
two bronchi tubes. These two tubes keep
splitting up and form your bronchiole.

11. The Bronchi Tubes and Bronchiole
These bronchi tubes split up, like
tree branches, and get smaller and smaller
inside your lungs.
The air flows past your bronchi tubes
and into your bronchiole. These tubes
keep getting smaller and smaller until they
finally end with small air sacs (called alveoli).
But we will go there later…

12. Alveoli and Bronchi Picture
Trachea
Bronchi Tubes
Bronchiole
Alveoli

13. Where are We? Nasal Passage Tongue Pharynx Bronchi Tubes
Alveoli (air-sacs)
Thin-walled blood vessels called capillaries
Very thin cells line the alveoli so that O2 and CO2 can pass in and out of the blood.
Bronchioles pass air to and from your alveoli.
The Trachea is held open by partial rings of cartilage.
Tongue
Pharynx
Where are We?
We are here.

14. The Alveoli and Capillary Network
Now we will head over to the
alveoli and what happens when the
air finally makes it down there.

15. The Alveoli and Capillary Network
Your alveoli are tiny air sacs
that fill up with air/oxygen when you
breath in.
Your alveoli are surrounded by
many tiny blood vessels called
capillaries.
The walls of your alveoli (and capillaries) are
so thin that the oxygen or carbon dioxide can
pass through them, traveling right into, or
out of your blood stream.

16. Alveoli Picture Here is a close Capillary up picture of your Alveoli
and a Capillary
surrounding it.
Capillary
Red Blood Cell
Oxygen is picked up
Carbon Dioxide is dropped off
Wall of the air sac

17. Videos http://www.youtube.com/watch?v=VcxyVN49QtI&feature=related