Human Respiratory System E-CLIP EIS Teaching – Learning Strategies / Procedures

Biology Secondary 5, duration 60 min.

Teacher: Mr.Wichai Likitponrak

Look at this Picture!

What

is this?

Introduction by this VDO!!!

https://www.youtube.com/watch?v=hc1YtXc_84A

Hi I am O2 ,you can call

me oxygen, and I will be your guide today.

I advise you keep all feet

and hands inside the ride at all times.

You may be asking, what is

the Respiratory system?

Well, the Respiratory system

is the system that 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. You must remember

that the Respiratory system

is made up of many different

organs.

Respiratory Overview Picture

Nasal

Cavity

Nose

Mouth

Bronchus

Bronchiole

Alveolus

Diaphragm

Throat

(pharynx)

Windpipe

(Trachea)

Left lungs

Ribs

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.

• When the air comes into your nose it gets filtered by tiny hairs

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.

Here is a picture of

your nasal and

oral cavity.

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.

• 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.

The Bronchi Tubes and Bronchiole • Your trachea (windpipe) splits up into two bronchi tubes.

These two tubes keep splitting up and form your 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).

The Alveoli and Capillary Network • Now we will head over to the alveoli and what happens when the air

finally makes it down there.

• 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.

Here is a close up picture

of your Alveoli

and a Capillary

surrounding it.

Alveoli Picture

Now we will look at the Diaphragm. You might be

wondering, what does the Diaphragm do? The Diaphragm

is an important factor in breathing.

Here is an experiment that you can try.

1st you need a bottle that you can sacrifice to

cut up.

2nd you cut the bottom of the bottle and put a big balloon on

the bottom.

3rd get a rubber cork ( make sure it blocks the hole)and put a

hole through it ( top to bottom). Insert a thin tube into the

cork and place a balloon on the bottom of the tube. 4th make sure the thing is airtight.

Fun Facts * At rest, the body takes in and breathes out about 10 liters of air each minute. * The right lung is slightly larger than the left. * The highest recorded "sneeze speed" is 165 km per hour. * The surface area of the lungs is roughly the same size as a tennis court. * The capillaries in the lungs would extend 1,600 kilometers if placed end to end. * We lose half a liter of water a day through breathing. This is the water vapor we see when we breathe onto glass. * A person at rest usually breathes between 12 and 15 times a minute. * The breathing rate is faster in children and women than in men.

Key Words Respiratory System- The group of organs in your body that are responsible for taking in Oxygen and breathing out the Carbon Dioxide which is the waste product of cellular respiration. Oxygen-The gas that your body needs to work and function. Carbon Dioxide- The waste product (gas) that is produced through respiration of people and animals. Nose/Nasal Cavity- Where Oxygen first enters your body. Tiny hairs help filter the air and air is moistened and heated by your nose. Your Nose leads into your Nasal Cavity. Mouth/Oral Cavity- Oxygen/air can also enter through your Mouth but it is not filtered. Your Mouth opens up into your Oral Cavity. Sinus- A cavity in the bones of your skull that helps moisten and heat the air that you breath. Pharynx/Throat- Gathers air from your Nasal and Oral Cavities and passes it to your Trachea. Trachea/Windpipe- A tube like pathway that connects your throat to your Bronchi Tubes and lungs. Air passes through it when it travels from the Pharynx to the Bronchi Tubes.

Key Words Bronchi Tubes- Each tube (one per lung) splits up into many smaller tubes called Bronchiole, like branches on a tree. Bronchiole- Keep splitting up until they reach your Alveoli. Respiratory Bronchiole- The air-tubes that are actually connected to the Alveoli. Alveolar Duct- The final tube, which is part of the Alveoli, that leads to the air-sacs. Alveolar Sac- Where the chemical change takes place and where blood cells pick up oxygen and drop off carbon dioxide. Alveoli- Tiny air-sacs at the end of your Alveolar Duct. They fill up with Oxygen and are surrounded by Capillaries. Capillaries- Tiny blood streams (around one cell wide) that surround your Alveoli. They take Oxygen out of our Lungs and replace it with Carbon Dioxide, which you later breath out. Diaphragm- The muscle membrane that helps you breath in and out by changing the pressure in your chest cavity.

Assignment:

Worksheet

Pages 6-8

◦ 1.1, 1.2 and 1.3

Sent me back

in this class !!!