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