This presentation created by :

Ana Novia Rahmawati (04) Hemas Surya ningrum (07) Hendy Aditama (09) Rahayu Hana Wijayanti.(20)

Expiration and inspiration

Respiration occurs in many step. Gasses exchange step between oxygen that entered with carbondioxide

What is our goal?

1. Knowing difference of CO2 content in the air of expiration and inspiration.

2. Understanding that water vapour as waste subtance of respiration.

What must we have?• Glass pipe• Lime water• Three pieces of reaction tube• Mirror• stopwatch

What should we do?1. Arrange experiment equipment like in

figure below !2. Blow expiration air through pipe 1A for 3

minutes. Observe What change happen !3. Suck Inspiration air through pipe 2B for

3 minutes. Then observe the change happen !

4. Compare A and B experiment with tube c as control !

Our task :Please make the laboratory report about that examination in group !

What will we discuss?• Activities 1 :1. How is the condition of limewater in A

and B experiment? Why it happens?2. Make conclusion from that activity !

• Activities 2 :1. After blow to mirror, what does appear

from that mirror?2. Why does mirror become wet? Explain !3. Make conclusion from that activity 2 !

Answer :

Expiration (releasing the air from lungs) is the air will be released from the respiration organs. Inspiration

( drawing the air into the lungs) is when we inhale, the air will enter the respiratory organs.

1.

Water Vapour Inhaled Air

( inspiration)Exhaled Air (expiration)

various 100%

2

•Activities 1

1. The equipment is :1. Glass pipe2. Lime water3. Three pieces of

reaction tube4. Mirror5. stopwatch

2. Tube A •Exhale into the tube through straw number 1 for about 3 minutes.When we inhale, the air will enter the respiration organs. This air is called inhaled air.

3. Tube B•Inhale the air from the tube through straw number 2 for about 3 minutes.On the other hand, when exhaling the air will be released from the respiration organs. This air is called exhaled air ( expiration)

Activities 2

2. The mirror be clean. The dust in the mirror is fly.

3. If we wipe the mirror with our hand, we felt cold in our hand.

Thank You