SCIENCE

9
Quarter 1 – Module 1:
Respiratory and Circulatory
Systems Working with the Other
Organ Systems
1

This Module is Based on : ALTERNATIVE DELIVERY MODE MODULES OF DEPED

Introductory Message

For the facilitator:

 Make the learners aware of the goals of gaining new knowledge through this
module. The lessons are made easy that one may not need other resource
materials. The given activities are important and are practical to help learners learn
better. You may guide and assist them in learning for themselves. Remind them to
handle this material with care and should use separate sheet of paper in answering
the “What I know”, “What’s More”,” What I Can Do” and Assessment.

For the learner:

This material covers subject matter that is divided into series of lessons. The
given activities were designed to help you learn better on your own or with little
help from others. Some lessons present new information or some that you already
knew. Every lesson presents learning task that requires response from you.

Pre-test, activities, self-check exercises and post-test should be answered in

separate sheet of paper. Would you like to find your answer correct, this module
provides important feedback by giving you easy access to the correct answer. Do
not look into it until after you have written your answer on your sheet. If you look
before answering, your learning process will only be impaired.

What I Need to Know

This module was designed and written with you in mind. It is here to help
you explain how the respiratory and circulatory systems work together to transport
nutrients, gases and other molecules to and from the different parts of the body.
The scope of this module permits it to be used in many different learning
situations. The language used recognizes the diverse vocabulary level of students.
The lessons are arranged to follow the standard sequence of the course. But the
order in which you read them can be changed to correspond with the textbook you
are now using.

The module is divided into 6 lessons, namely:

 Lesson 1.1 – The Respiratory System
 Lesson 1.2 – The Lungs Work and Movements of Diaphragm
 Lesson 1.3 – Components of the Circulatory System
 Lesson 1.4 – Types of Blood Circulation
 Lesson 1.5 – How Blood is Pumped by the Heart
 Lesson 1.6 – Respiratory and Circulatory Systems Working Together

After going through this module, you are expected to:

1. identify the key parts of the breathing system;
2. describe the function of each part of the breathing system;
3. explain how the lungs work;
4. describe the movement of the diaphragm helps the air go in and out of the
lungs;
5. identify the components of the circulatory system;
6. explain the different types of circulation;
7. explain how blood is pumped by the heart; and
8. explain the mechanism of how the respiratory and circulatory systems work
together.

What I Know

Choose the letter of the best answer. Write the chosen letter on a separate
sheet of paper.

1. Which of the following system is responsible for taking in oxygen and

removing carbon dioxide?
A. Circulatory system B. Digestive system
C. Endocrine system D. Respiratory system

2. The liquid component of the circulatory system that transports nutrients

and oxygen to the different parts of the body is?
A. heart B. blood D. blood vessels D. ventricles

3. Where is carbon dioxide absorbed from the blood?

A. Alveoli B. capillaries C. pulmonary artery D. pulmonary vein

4. The respiratory system is made up of organs of the upper

respiratory track, the lungs and__ _?
A. Diaphragm B. esophagus C. Liver D. pancreas

5. Which of the following carries oxygen to the different parts of the body?
A. arteries B. blood cells C. Capillaries D. red blood cells

6. It is the external openings of the nose.

A. nasal cavity B. nasal septum C. nostrils D. sinuses

7. The chamber of the heart that pumps blood to the different parts of the
body is _.
A. atria B. septum C. pericardium D. lymph nodes

8. Oxygen moves from alveoli to the blood through these tiny blood vessels
that line the alveoli walls called .
A. air tubes B. bronchioles C. capillaries D. cilia

9. Which of the following organs pump blood through the blood vessels?
A. brain B. heart C. kidney D. lungs

10. How many chambers does the heart have?

A. six B. five C. four D. three

11. With circulation, the heart provides the human body with___.
A. oxygen B. nutrients
B. a way to get rid with waste D. all of the above.

12. What organs are in the upper respiratory tract?

 A. nasal cavity, larynx, pharynx
B. nasal cavity, larynx, pharynx, lungs
C. nasal cavity, bronchi, lungs, diaphragm
D. nasal cavity, pharynx, trachea, lungs, diaphragm

13. Which heart chambers has the thickest wall?

A. left atrium B. right atrium
C. left ventricle D. right ventricle

14. The biggest artery in the circulatory system is the_ _

A. aorta B. hepatic artery C. pulmonary artery D. renal artery

15. Lola Connie’s sphygmomanometer’s reading is 120/80mmHg. What does

the 120mmHg reading indicate
A. red blood cell count B. white blood cell count
C. diastolic pressure C. systolic pressure

16. What about the 80mmHg reading?

A. red blood cell count B. white blood cell count
C. diastolic pressure C. systolic pressure

17. The sites of exchange of wastes, nutrients, and gases between the
blood and body cells are the____
A. arteries B. arterioles C. capillaries D. veins

18. The two branches of the trachea that connects each lung are .
A. alveoli B. bronchi C. bronchioles D. lungs

19. The function of the heart valves is to _.

A. pump blood
B. receive blood from the ventricles
C. separate the two sides of the heart
D. prevent the blood from flowing back

20. Respiratory System : gasses; Circulatory System :_ _

A. blood B. carbon dioxide C. oxygen D. red blood cells

21. The process of intake of oxygen into the lungs.

A. exhalation B. expiration C. inhalation D. respiration

22. When you breathe in air, you bring oxygen into your lungs and blow
out_____?
A. carbon dioxide B. carbon monoxide C. hydrogen D. oxygen

23. The type of blood vessels that transport oxygenated blood throughout the
Body.
A. veins B. arteries C. capillaries D. lymph nodes

24. The Left lung is made of how many lobes?

A. 1 B. 2 C. 3 D. 4

25. The organ of the circulatory system that pump blood is _

A. heart B. blood C. blood vessels D. lymph nodes
26. I. Oxygen gets into every cell in your body in the
alveoli, to the red blood cell in the capillaries to the
arteries, to the heart then to the different parts of
the body.
II. Carbon dioxide is carried from the different parts of
the body into the capillaries to the vein, to the heart
then to the lungs.

Which statement is correct?

A. Statement I B. Statement II
C. Both statements D. Neither of the statement

27. During exercise, you need more oxygen because the cells _ _.
A. begin to die B. need it for energy
C. produce more carbon dioxide D. all of the above

28. The following are components of blood EXCEPT _

A. plasma B. red blood clees C. white blood cells D. lymph
nodes

29. During internal and external respiration, gases move by:

A. active transport B. diffudion C. osmosis D. all of the above

30. The organ system that works closely with the respiratory
system in gas exchange is the_ _.
A. Circulatory system
B. Digestive system
C. Excretory system
D. Lymphatic system
 Lesson

1.1 The Respiratory System

Have you ever wondered how does the air from the environment comes in
and out in your body? How the oxygen supplies the lungs and other body parts to
make it work and function? The Human Respiratory System is composed of
different organs responsible for gas exchange. The oxygen enters the body as you
breathe in for the cells to live and function properly, and remove carbon dioxide as
you breathe out.

What’s In

You will find out in this lesson the structures and

function of the respiratory system. You will go through each part like
you are having an adventure inside the respiratory system. Images are
provided for you to visualize the part you are reading, to explore and
be amaze of what your respiratory system looks like in real life.
Everything is provided for you to learn in this module; read the words,
understand the thought, and highlight the concepts that might help
you to accomplish this module.

What’s New

The Respiratory System

Have you tried to pinch your nose for less than a minute, like
30 seconds? What did you feel? What did you do after you remove
your hand? Yes, the first thing you did was gasp for air and breathe
again. Anything that blocks the airflow from entering the nose and
mouth through the trachea into the lungs will cause difficulty in
breathing. Breathing is the process of intake of air into the lungs
(inhalation) and expulsion of carbon dioxide (exhalation). It is true that
humans can survive without food and water in days, but cannot live
without air in minutes.

Respiration is the first thing that happens in the gas exchange

between cells and the environment. The respiratory system works
 hand in hand with the circulatory system, they cannot be separated
and cannot work alone. This is the reason why the respiratory system
should function correctly as it is vital to the body’s health.

Parts and Functions of the Respiratory System

There are many different organs present in the gas exchange.
The human respiratory system is divided into two components: upper
and lower respiratory tracts.
I. UPPER RESPIRATORY TRACT
1. Nose – gateway and the first organ of the respiratory system
wherein the air (oxygen) enters the body. It is responsible for
the sense of smell and helps in respiration and speech
production.
• Nostrils – also called as “nares.” These are external
openings in the nose and serves as the passage of air
into the body.

• Nasal cavity – inside part of the nose. It warm,

moisturize and filter the air that enters the body. It is
lined with a mucous membrane that helps keep the nose
moist by producing mucus.
• Cilia – tiny hairs that are located on the surface cells
of the mucous membrane that moves back and forth.
The mucus traps any foreign particles which moved by
the cilia toward the front of the nose. This helps clean
the air before it goes to the lungs.
• Mucous membrane – lines the nasal cavity. It
produces mucus that is moist and sticky that captures
dust, germs, and small particles that could irritate the
lungs.
2. Throat or Pharynx – passageway of air from the oral and
nasal cavities to the lungs, it is also the passage of food to the
esophagus. Adenoids and tonsils are located in the pharynx
which plays an important role to protect the body from
infection.
3. Voice Box or Larynx – a hollow tubular structure that
connects the pharynx and the windpipe (trachea). It is where
the vocal folds or vocal cords lie and prevents the passage of
food and other foreign particles in the lower respiratory tracts.
The epiglottis is leaf-shaped flap cartilage behind the tongue
which protects the trachea during eating to prevent from
inhalation of food. (Figure 1-1. The epiglottis and vocal folds)
 Figure 1-1. The epiglottis and vocal folds

II. LOWER RESPIRATORY TRACT

1. Windpipe or Trachea – a cartilaginous tube that connects

the larynx to the bronchi of the lungs. It serves as a
passageway of air, moistens, and warms while it passes into
the lungs.
2. Lungs – it is the primary organs of the respiratory system.
The lungs are protected by a bony and muscular rib cage and,
a double-layered membrane (pleura) that lines the thoracic
cavity and covers the lungs.
3. Bronchi and Bronchioles – the two branches that split from
the trachea and lead directly to the lungs, called bronchi
(singular, bronchus). Bronchioles are small bronchial tubes
that deliver air to alveoli.
4. Air sacs or Alveoli – tiny air sacs like grapes located at the
end of the bronchial tubes and are surrounded by blood
capillaries. The gas exchange of oxygen and carbon dioxide
happens between the alveoli (singular, alveolus) and blood by
the process of diffusion. (Figure 1-3. (b) The magnified view of
alveoli)
5. Diaphragm – a dome-shaped structure that separates the
chest and abdomen. It is the main respiratory muscle
responsible for inhalation and exhalation. During inhalation,
the lungs expand and the diaphragm moves downward. In
exhalation, the diaphragm relaxes and returns to its normal
shape.
 Rib
s

Figure 1-2. (a) Parts of the respiratory system; (b) The magnified view of alveoli

What is It

The respiratory system is a series of multiple organs responsible for gas

exchange. Every part in the respiratory system is important to function and deliver
oxygen to the blood and eliminate carbon dioxide from the blood with the
circulatory system. These two systems cannot function alone, but need one another
to function as a whole.

What’s More

Activity 1.1 Every Breath You Take (Critical Thinking)

This activity will let you recall the structures and functions of the
respiratory system. It is divided into two parts which will assess your
understanding and familiarization of the structures.
I. Identify and locate the parts of the respiratory system using the
word bank below.
Humans and animals need 1. to live. 2. is a

type of gas that enters inside the body. The 3. ________________system is

responsible for exchange of oxygen and carbon dioxide inside the body.

During 4. , we breathe in air and

enters in the 5. _ which is the first organ in

the respiratory system.

From there, it will pass through the 6._ and will travel

down to the start of the lower respiratory tract, 7. ___________________ The

trachea have branches called

8. which lead to the 9. the primary organs of

the respiratory system.

Oxygen enters the 10. and at the same time, the waste gas

11. leaves the blood and body by 12. .

Activity 1.2 Take My Breath Away (Creative Thinking)

This activity will let you observe your own breathing patterns
when at rest, and after every physical activity.

Procedure:
1. Perform some movements that will measure your
breathing patterns by taking specific counts and data
analysis.

2. You will measure the breaths per minute when at

rest, moderate movement and exercise for 60
seconds.

Remember :
 1. From the three sets of activities, perform one at a time.
1. The required movements should be done only for 60 seconds.

2. After doing the required action, start to count your number

of breaths for 60 seconds.

3. Perform the first activity. Do steps 2 and 3. Record

your number of breaths.
4. Do the same in the second activity. Then in the third activity.

5. Plot the results on the table below. The details will be

placed on a tabulated format to compare the
breathing patterns in each activity.

6. Analyze the data you recorded by comparing the number

of breaths per minute after performing each activity

7. Write your conclusion.

TABLE OF RESULTS

Breaths per
minute
Activities
(60 seconds)
Rest – sitting
Moderate movement -
walking
Exercise - jumping jack

CONCLUSION:
 What I Have Learned

1. The respiratory system transports oxygen to all the cells in the

body and remove carbon dioxide. The organs responsible for
respiration are the nose, pharynx, larynx, trachea, bronchi
and lungs.
2. Breathing is a process of intake of oxygen (inhalation) and
expulsion of carbon dioxide (exhalation). The diaphragm
contracts during inhalation and relaxes during exhalation.
3. The respiratory system is divided into two components: upper
and lower respiratory tracts.
4. The larynx produces vocal sounds and prevents the passage of
food and other foreign particles in the lower respiratory tracts.
The trachea moistens and warms the air before it pass into the
lungs.
5. Lungs are the primary organs of the respiratory system.
Alveolus is the center of the gas exchange in the respiratory
system.

What I Can Do

Self-Check. Differentiate the following terms. Write your

answers on a separate sheet of paper. (Critical Thinking)

1. inhalation, exhalation
2. bronchi, bronchioles
3. oxygen, carbon dioxide

Access printable worksheet: (Critical Thinking)

https:www.liveworksheets.com/worksheets/en/Science/Respiratory_Syste
m/Respiratory_System_vt7265sh

Note: Print and take a photo of your answered worksheet and send
online to your respective teacher
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