This document provides information about the respiratory system and how to keep it healthy. It discusses the difference between breathing and respiration and explains the importance of respiration. It describes the parts of the respiratory system including the nose, pharynx, larynx, trachea, bronchi, bronchioles, alveoli, lungs, diaphragm and their functions. It emphasizes the role of the nose in warming and filtering air before it reaches the lungs. It also discusses how to keep the respiratory system healthy through avoiding smoking and keeping the lungs protected.

1. Dear student , Are you interested in Tourism in Egypt ?

2. Dear Student , Are you interested in Diving sport ?

3. So , Our lesson today is about :

4. But before we study the respiratory system, we must know the
difference between two processes that they are :
•Breathing.
•Respiration.

6. So , why is respiration important ?

9. Which is better .. Breathing from your nose or mouth?

10. That’s why ..We breathe from our
nose !
1.The Nose : “ it is like a filter as we can say ! “
1. The first organ of our respiratory system .
2. Breathing from Nose is better than Mouth as :
 It is lined from inside by hair and mucus to prevent any dust or microbes in the
air of entering the lungs It also has blood capillaries to warm the air before
entering the lungs.

11. Dear student , Avoid negative smoking .

12. 2. The pharynx
• It is a common cavity that leads to each of :
1. Digestive system by Esophagus .
2. Respiratory system by Trachea .

13. The Larynx ( The Voice Box )
• Who is your favorite singer?
• Have you known that your respiratory system is responsible for your Voice !
The reason for that is :
Position : Above the trachea (windpipe) is the larynx , which is sometimes called
the voice box. Function : Across the voice box are two tiny ridges called vocal
cords, which open and close to make sounds.

14. 4. The Trachea ( The Wind Pipe )
• It is a tube with incomplete Cartilaginous rings … Why ?
• At the Top of Trachea .. There is the Epiglottis .
… So what is the Role of Epiglottis ?

15. Life Issue 
• While eating or drinking some thing .. Have you had a Sudden Cough
Reflex ?
• You Know why … !
So the role of Epiglottis is to prevent any Food or water from entering the air
tract during swallowing .

16. 4. Trachea
• It also lined by Cilia … can you guess why ?
It is lined by Cilia to eject out any strange object in the air to enter the lungs.

17. To imagine … Cilia are similar to the sweeper

19. Bronchi
• At the end of the Trachea , There are two Bronchi that enter the Lungs .
• Each Bronchus of the Bronchi branches into every lung and get smaller and
smaller ( like branches in a big tree ).
• The Tiniest tubes are called Bronchioles and there are about 30.000 Bronchioles
in each lung.

20. Alveoli
• Bronchioles end in tiny air sacs called Alveoli , which are surrounded by networks
of blood capillaries .

21. The Role of Alveoli
These role are summarized into Gas Exchange as blood takes oxygen from
inhaled air and gets rid of carbon dioxide and water vapor that goes out with
exhaled air .

22. The Lungs
• Do you love your lungs ?
• Have you known that your lungs allow you to breathe, talk to your friend, and
shout at a game, sing, laugh, cry, and more .. !
So let’s know more about our lungs …

23. The lungs
• Location :
Your lungs are in your chest .
•Size :
From your guessing , Are the lungs having the same size ? Why !
the lung on the left side of your body is a bit smaller than the lung on the right.
This extra space on the left leaves room for your heart .

24. Lungs Protection
• Your lungs are protected by 12 sets of ribs that go around the lungs to keep them
safe .
• Your lungs also surrounded by Pleural Membrane that :
1. Keeps them from getting damaged by the Bones , Muscles and Ribs .
2. Makes the Respiration easy to them by the pleural fluid .
To see this pleural membrane visit this site : novella.mmhe.com

25. Dear student , Do you know what is the difference ?

26. Can you imagine that !

27. The Diaphragm
• At the end of your lungs there is the Diaphragm .. That is a dome-shaped
muscle that works with your lungs to allow you to inhale (breathe in) and
exhale (breathe out) air.

28. Play with your lungs 
Play with your lungs and say “ Thanks Alveoli “
You can't see your lungs, but it's easy to feel them in action .
1. Put your hands on your chest and breathe in very deeply. You will feel
your chest getting slightly bigger.
2. Now breathe out the air, and feel your chest return to its regular size.
You've just felt the power of your lungs ! And the role of every Alveoli of
600 million yours !

29. Your Lungs & Recycling
• You can keep your environment clean & Recycle old things & Play By making a
model of your Respiratory system By watching this Video .

30. Dear student , Do you like Drawing ?
• What about this idea .. !

31. Application on the Respiratory system will be done
by you !
• Why do I yawn ?
• Why do I Sneeze ?

32. Life Issue 
• As you can’t see your blood capillaries .. But you can feel them now !
But How …. !
1. Breathe in some Air ( inhalation )
2. Breathe out this Air ( exhalation ) , And put your hand in
front of the exhaled Air .. What will you feel ?
Conclusion
The exhaled air is warm .. As air travels through your
body .. And picks up heat along the way .

33. Mechanism of Respiration
• This will our next lesson as Allah willing .

34. Inhaling & Exhaling

35. How to keep your respiratory system healthy?