This document provides information about the respiratory system and breathing, including key vocabulary terms and the difference between active and passive voice. It defines terms like nostril, trachea, air sacs, and epiglottis. It also gives examples of sentences in active voice like "We breathe in oxygen" and passive voice like "Oxygen is breathed in by Sukjai." The document then describes a lung model experiment using a water bottle, plastic bag, and balloon to demonstrate breathing.

4. What did
you see on
the video?

5. Vocabulary

6. One of the two opening in the
nose through which one
breathes, smells etc.
nostril (n)

7. the tube that carries air from
your throat to your lungs
trachea (n)

8. a wide part like a bag in the tubes an
insect uses for breathing
air sacs (n)

9. a small flat part at the back of the
tongue that closes when you swallow
to prevent food from entering the
tube which goes to the lungs
epiglottis (n)

10. the tube in the body that
carries air that has been
breathed in from the upper
end of the throat to the lungs
windpipe (n)

12. Active voice
and
Passive voice

13. Active Voice
In Active Voice, the subject is doing the action while
the object is the one receiving the action
S + V O+

14. Example
We breathe in oxygen.
subject we
verb
=
breathe in=
object = oxygen

15. Examples:
We breathe out carbon
dioxide.
The pharynx carries both food
and air.

16. Passive Voice
The subject is the receiver of the action.
The doer is found at the end of sentence.

17. Passive Form:
object +
v. to be +
past participle verb
+ by
+ subject
You can add

18. [Thing receiving action] + [be] + [past participle
of verb] + [by] + [thing doing action]
The walls of the windpipe are made strong
by stiff rings.

19. How to use passive Form:
When the object receives
the action of the verb.
When we want to make
the active object more
important.
When we don’t know
the active subject.

20. Examples:
This is called the
oesophagus.
Air can also be breathed
in trough the month.
Voice box is located at the
top of the trachea.

21. How to formulate the Passive Voice ?
1. Put the object of the verb at the beginning of your sentence
2. Conjugate the verb to be in the same sentence as the active
sentence
3. Put the main verb in the past participle form
Sukjai breathe in oxygen.
Oxygen is breathed in by Sukjai.

22. Which sentence is
Passive voice ?
1.We breathe in oxygen.
2.This is called the oesophagus.
3.We breathe out carbon dioxide

24. nose
throat
voice box
windpipe
lungs

27. Pharynx

29. alveoli

32. What will
happen with
breathing when
we do the
exercise ?

33. Experiment time!!!
Lung Model

34. Direction
1. Take the bottle of water and remove the cap.
2. fasten the plastic bag over the bottom of water
bottle
3. Take a balloon and stick it into the top hole of the
bottle.
4. Stretch the lip of the balloon over the tip of the
bottle

36. The opening the top of
the bottle is represented
………….…………………………
A water
bottle is
….………….