I.
Objectives
At the end of the learning session, the students should be able to:
a. Describe the function and uses of respiratory system;
b. Participate actively in class discussion; and
c. Answer simple activity in the book.
II. Subject Matter
a. Topic: Respiratory System pages: 25-30
b. Reference: Science in Action 6
c. Authors:
d. Materials: pictures, chart
III. Procedure
A. Daily Routines
a. Prayer
b. Greetings
c. Checking of Attendance
B. Lesson Proper
Teacher’s Activity Student’s Activity
a. Motivation
Before we proceed to our next topic, let’s
have an activity first. I have a picture
here and you will describe the picture.
Yes ma’am!
What did you observed in the picture?
There’s a lungs ma’am.
Very good!
What else?
Amazing! It shows how we breathe.
b. Discussion
Based from our activity, it shows some of
our organs that are responsible for our
breathing.
What do you think the primary organs
that we need for breathing?
Nose
Pharynx
Larynx
Trachea
Bronchi
Lungs
Great!
What do you call the series of organs
responsible for taking in oxygen and
expelling carbon dioxide?
Respiratory System
Very good!
When you hear the Respiratory System,
what comes into your mind?
transporting nutrients to keep the lungs
clean, and healthy.
Excellent!
The respiratory system is a biological
system consisting of specific organs and
structures used for gas exchange in
animals and plants.
Based on the activity earlier, you saw the
different parts of a Respiratory System.
Let’s discuss first the nose.
What comes into your mind when you
hear the word nose?
The nose and nasal cavity form the main
external opening for the respiratory
system and are the first section of the
body’s airway—the respiratory tract
through which air moves.
Marvelous!
Next is the mouth. What is the function
of mouth in our respiratory system?
The mouth, also known as the oral cavity,
is the secondary external opening for the
respiratory tract. Most normal breathing
takes place through the nasal cavity, but
the oral cavity can be used to
supplement or replace the nasal cavity’s
functions when needed.
Very good!
The third is the pharynx. Do you know
what is pharynx?
The pharynx, also known as the throat,
the pharynx connects the nasal cavity
and mouth cavity.
Good!
The fourth is the larynx.
What is the function of larynx?
The larynx, also known as the voice box.
It contains the vocal cords that vibrate to
produce sound when you talk.
Nice!
The next is the trachea. What is the use
of trachea?
The trachea connects the larynx to the
bronchi and allows air to pass through
the neck and into the thorax.
Great!
The second to the last organ is the
bronchi. What is the use of bronchi? are the main passageway into the lungs.
When someone takes a breath through
their nose or mouth, the air travels into
the larynx.
Excellent!
The last organ are the lungs. What is the
function of lungs? The lungs are the main respiratory
organs where the exchange of gases
occurs.
Very Good!
c. Generalization
What are the parts of the Respiratory
System?
Nose
Mouth
Pharynx
Larynx
Trachea
Bronchi
Lungs
Excellent!
d. Application
Let’s have an activity class! You will
label the picture. You will choose the
right answer in the box.
e. Evaluation
a. Arrange the scrambled letters to
form the word that is described.
_____1. slugn – the main organs of
respiration.
_____2. anxphyr – also known as a
throat.
_____3. heartac – also known as a
windpipe.
_____4. xarlyn – also known as a
voice box.
_____5. chonbir – tubes that lead to
lungs.
b. Write the function of the
following.
1. Lungs
2. Trachea
3. Bronchi
4. Larynx
5. Pharynx
6. Nose
f. Assignment
Draw a pathway of air in the
respiratory system.
Good bye, class!
Good bye, ma’am!
End of Discussion
