20
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.
Respiratory Overview PictureNasal Cavity
Nose
Mouth
Bronchus
Bronchiole
Alveoli
Diaphragm
Throat
(pharynx)
Windpipe (Trachea)Left lungs
Ribs
This is where it all begins. This is where the oxygen first
enters your body and also where Carbon Dioxide leaves.
The Nose and Mouth
The Nose and MouthWhen 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 yourmouth/oral cavity but air is not filtered as
much when it enters in through your mouth.
Nose and Mouth Picture
Nasal Cavity
Nostril
Oral CavityPharynx
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.
The Pharynx and 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 ringsof cartilage.” Without these rings your trachea might close off and air would not be able to get
to and from your lungs.
Pharynx
(Throat)
Mouth
Trachea
Nasal Passage
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.
Your trachea (windpipe) splits up into two bronchi tubes. These two tubes keep splitting up and form your bronchiole.
The Bronchi Tubes and Bronchiole Intro
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 tubesand into your bronchiole. These tubes
keep getting smaller and smaller until theyfinally end with small air sacs (called alveoli).
But we will go there later…
Alveoli and Bronchi Picture
Trachea
Bronchi Tubes
Bronchiole
Alveoli
Nasal Passage
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.
Now we will head over to the alveoli and what happens when the
air finally makes it down there.
The Alveoli and Capillary Network
The Alveoli and Capillary Network
Your alveoli are tiny air sacsthat fill up with air/oxygen when you
breath in.
Your alveoli are surrounded bymany 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, orout of your blood stream.
Alveoli Picture
Here is a closeup picture ofyour Alveoli
and a Capillarysurrounding it.
Capillary
Red Blood Cell
Oxygen is picked up
Carbon Dioxide is dropped off
Wall of the air sac
Nasal Passage
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.
Alveolus
BronchioleRespiratory BronchioleAlveolar DuctAlveolar SacCapillaries
Looking at the Alveoli
Lets take a closer look shall we.
Cool pictures
http://www.youtube.com/watch?v=bwXvqSqAgKc
http://www.youtube.com/watch?v=sU_8juD3YzQ
