The learners demonstrate understanding of;
1. the digestive system and its interaction with the circulatory, respiratory, and excretory systems in providing the body with nutrients for energy
2. diseases that result from nutrient deficiency and
B. Performance Standards
The learners should be able to present an analysis of the data gathered on diseases resulting from nutrient deficiency.
C. Learning Competencies / Objectives
(Write the LC code for each)
Explain ingestion, absorption, assimilation, and excretion. S8LT-IVa-13 Explain ingestion, absorption,
assimilation, and excretion. S8LT-
IVa-13
II. CONTENT
(Subject Matter)
The Digestive System The Digestive System The Digestive System CATCH-UP FRIDAY
III. LEARNING RESOURCES
A. References
1. Teacher’s Guide pages
MELCs Science 8 Quarter 4 pp. 390 MELCs Science 8 Quarter 4 pp. 390 MELCs Science 8 Quarter 4 pp. 390 MELCs Science 8 Quarter 4 pp. 390
2. Learner’s Materials pages
Science 8 Quarter 4 – Module 1:
Structures and Functions of the
Digestive System, pp. 2-19
Science 8 Quarter 4 – Module 1:
Structures and Functions of the
Digestive System, pp. 2-19
Science 8 Quarter 4 – Module 1:
Structures and Functions of the
Digestive System, pp. 2-19
3. Textbook pages
4. Additional Materials from Learning
Resources (LR) Portal
B. Other Learning Resources
TV, laptop, PowerPoint presentation and paper or notebook
IV. PROCEDURES
A. Reviewing past lesson or Presenting
the new lesson
Directions: Use the list of elements
in decreasing order of reactivity as
shown in the box.
Food plays a central role in the
survival of species. Food gives
organisms energy that enables
them to carry out the many
activities they do each day; this
includes predators chasing a prey
or a prey escaping a predator,
arboreal organisms climbing trees
to gather fruits, or fish swimming
in schools in search for food, to
name a few. Organisms are able to
obtain energy from the foods they
eat through digestion. Digestion of
food is carried out by the organs
IT’S ALL ABOUT THELABEL
Identify the numbered parts of the
digestive system. The first 6 items
include the main parts while items
7- 9 are the accessory organs of
digestion. You may choose your
answers from the box.
I. Motivation
Directions: Match the
structure/behavior of mechanical
digestion in Column A and its
function in digesting food in Column
B. Write only the letter of the
correct answer.
and substances of the digestive
system. During digestion, food is
broken down to smaller parts -- a
fraction of which is made up of
nutrients. These nutrients are
circulated to the different parts of
the body through the bloodstream
and assimilated by cells.
II. Concept Exploration
Now I Know!
The digestive system is an
important part of our body. It helps
our body break down bulk of food,
absorb essential nutrients from
what we eat and even get rid of its
waste product. Digestive systems
may suffer complications that range
from mild to severe, so it is
important to recognize common
problems related to digestion.
Directions: Create an infographic of
the digestive system - parts and
functions as well as the disorders
that you might be getting from
malfunction of some organs of the
system.
Note: An infographic is a collection
of images, diagrams, and text that
provides an easy-to-understand
general idea of a topic. Most
infographics use prominent and
attractive illustrations to converse
the facts quickly and clearly.
III. Valuing
What are you going to do to avoid
certain diseases related to digestive
system?
B. Establishing a purpose of the new
lesson
Tummy Puzzle!
Directions: Hidden in the word
puzzle are terms associated with
the digestive system. Pick fifteen
(15) of these terms and write your
answers on a separate sheet of
paper.
Why do we eat? Is eating necessary
to keeping us alive? Where do we
get the energy that enables us to
carry out the many activities that
we do each day? How do we obtain
materials needed for the growth
and repair of body parts?
The food that we eat plays a central
role in the survival of species. It
provides the energy that enables us
to carry out the many activities that
we do each day such as breathing,
walking, studying and cooking.
Food also provides the substances
needed for growth and repair of
body parts.
The cells in the body need food for
energy used for growth and repair.
Food must be broken down into a
form that these microscopic cells
can use. The body changes food
into a usable form by means of a
group of organs referred to as the
digestive system.
What specific instances in your life
that you followed a path?
C. Presenting Examples/ instances of
the new lesson
A Gutsy Game!
This activity is a board game that
needs at least two players. The
game demonstrates the flow of
food into our digestive system. The
first one to reach the finish tile
wins!
Objectives:
After performing this activity, you
are expected to:
1. Identify the parts that compose
the digestive system; and
2. Describe the function of each
organ.
The processes of digestion include
six activities: ingestion, propulsion,
mechanical or physical digestion,
chemical digestion, absorption,
and defecation.
The food we eat every day also
follows a path, for it to be
converted into the energy that we
need.
D. Discussing new concepts and
practicing new skills no. 1
Questions:
1. What does the playing token
represent?
2. What do the boxes in the game
represent?
3. What do the instructions beside
the boxes tell you about the
digestive system?
A Sweet Break!
Procedure:
1. Fill the two beakers with warm
water. Make sure that the amount
of water placed in each glass is
about the same. Label the glasses A
and B.
2. Prepare two pieces of candies.
Wrap a piece of candy in a paper
towel and crush it using a mortar
and pestle or any hard object like a
piece of wood.
3. Place one piece of candy into the
glass of warm water labeled A and
place the crushed pieces of candy in
the remaining glass of warm water
labeled B.
4. Observe how long it takes for the
whole candy in Glass A and the
crushed pieces of candy in Glass B
to dissolve.
5. Record your observation.
I Fill You!
Directions: Label the main organs
involved in the digestive system in
the figure and answer the questions
that follow. Write your answers on
a separate sheet of paper.
1. Label the organ pointed at by the
arrow.
2. Name the enzymes secreted by
the organs identified from box #1,
#3 and #4.
_____________________________
3. The liver produces bile. How does
bile help in digestion of food?
_____________________________
E. Discussing new concepts and
practicing new skills no. 2
The function of the digestive system
is digestion, the breakdown of
organic compounds into their
simple forms for use by the cells.
Digestion is the chief function of the
digestive system. It breaks down
food mechanically and chemically.
A. INGESTION is the first process
that happens in digestive system. It
is the journey of taking in food or
any substance into the body
through the mouth. The journey of
food starts when a bit of hamburger
enters your mouth.
B. DIGESTION is the second process
involved in the digestive system. It
is the process that involves breaking
down of large food molecules into
smaller molecules for easy
absorption of the cells. Both
chemical and mechanical digestion
begin immediately in the mouth.
C. Absorption is the third process
that happens in the digestive
system. It occurs mostly in the small
intestine where several digestive
juices, pancreatic juice, and bile aid
in the chemical digestion of food.
D. Assimilation is the fourth
process that occurs in the digestive
Questions:
1. How does crushing the candy to
smaller pieces affect its
dissolution?
2. What does crushing the candy
represent in the process of
digestion?
system. It is the movement of
digested food nutrients into the
blood vessels of the small intestine
through diffusion and use of
nutrients into the body cells
through the microvilli – microscopic
cellular membrane projections that
serves to expand the surface area
for diffusion and also to lessen any
increase in volume.
E. Egestion is the last process that
occurs in the digestive system. It is
the release of undigested food
collected in the rectum called feces
and pushed out of the body through
the anus by defecation.
F. Developing Mastery
(Leads to Formative Assessment 3)
Pick Me UP!
Directions: Identify the five organs
that are part of the digestive system
from among the picture in the box
below. Write only the letters
corresponding to your answer on a
separate sheet of paper.
Match ME!
Directions: Describe the function of
each organ in the digestive system
by matching column A with column
B. Write only the letter of the
correct answer on a separate sheet
of paper.
Share It!
Directions: Study the figure below
and answer the questions that
follow. Write your answers on a
separate sheet of paper.
Questions:
1. When does ingestion begin?
2. What happens to food when it is
in your:
a. mouth
____________________________;
b. stomach
___________________________;
c. small intestine
3. How are nutrients from the food
you eat absorbed after digestion?
4. Why are villus and microvilli
important in the human digestive
system?
5. What happens to the undigested
food in the large intestine?
G. Finding practical application of
concepts and skills in daily living
I Create You Gullet!
Directions: Create a comic strip of
digestive process on a sheet of
bond paper based on the situation
below. Put a title of your comic strip
on one square. Make ten more
squares for your story. Each square
shall show both drawings and
words to tell your story. The
following terms and concepts
should include in your comic strip:
Situation: Imagine that you are a
piece of food (bread, pizza, mango,
etc.) that is about to be eaten by a
human being! As you journey
through the digestive system,
starting from the first bite and
ending with your exit from the
human body, you are able to meet
the different organs and enzymes
that interact with you.
How does food move through your
digestive system?
What are the things you should
consider in choosing the food you
eat? Why?
H. Making generalizations and
abstractions about the lesson
Wordy GUT!
Directions: Complete the
crossword puzzle. Write your
answers on a separate sheet of
paper.
Explain ingestion, absorption,
assimilation, and excretion
What have you learned in our
discussion?
I. Evaluate learning What I Know The Human Digestive System Assessment
Directions: Choose the letter of the
correct answer. Write your answers
on a separate sheet of paper.
(Module 1 pp. 2-4)
Directions: Use the words to fill in
the blanks.
All animals need to eat
___________ to get __________to
live. But in order to use this food,
they have to break it down in a
process called _______________.
And so, all animals have a group of
connected organs called the
digestive ________________. In
humans the process of digestion
begins in the ___________ where
food is _______________ into small
pieces by the teeth. The
_____________ helps by moving
these pieces around. These pieces
are covered by ____________ or
spit. The saliva makes the food
slippery so that it is easier to
____________. It also helps to
break down food. Once the food is
swallowed, it passes through the
__________, which is like a gate
that sends food into the
____________ and air into the
lungs. Food travels down the
esophagus and into the _________.
Once the food is mixed with
________ and crushed some more.
After spending some time in the
stomach, the food is sent into the
___________ where nutrients are
_________. The __________ helps
by producing some digestive juices
called bile. Next, the remaining
food goes into the ___________
where the ___________are
absorbed. The remaining food is
called ___________ and it is pushed
into the __________where it wait’s
before leaving the body.
Directions: Choose the letter of the
correct answer. Write your answers
on a separate sheet of paper.
(Module 1 pp. 17-19)
J. Additional activities for application or
remediation
V.REMARKS
VI.REFLECTION
A. No. of learners who earned 80%
in the evaluation
B. No. of learners who require
additional activities for remediation
who scored below 80%
C. Did the remedial lessons work?
No. of learners who have caught up
with the lesson
D. No. of learners who continue to
require remediation
E. Which of my teaching strategies
worked well? Why did this work?
Strategies used that work well:
___ Group collaboration
___ Games
___ Power Point Presentation
___ Answering preliminary
activities/exercises
___ Discussion
___ Case Method
___ Think-Pair-Share (TPS)
___ Rereading of Paragraphs/
Poems/Stories
___ Differentiated Instruction
___ Role Playing/Drama
___ Discovery Method
___ Lecture Method
Why?
___ Complete IMs
___ Availability of Materials
___ Pupils’ eagerness to learn
___ Group member’s Cooperation
in doing their tasks
Strategies used that work well:
___ Group collaboration
___ Games
___ Power Point Presentation
___ Answering preliminary
activities/exercises
___ Discussion
___ Case Method
___ Think-Pair-Share (TPS)
___ Rereading of Paragraphs/
Poems/Stories
___ Differentiated Instruction
___ Role Playing/Drama
___ Discovery Method
___ Lecture Method
Why?
___ Complete IMs
___ Availability of Materials
___ Pupils’ eagerness to learn
___ Group member’s
Cooperation in doing their tasks
Strategies used that work well:
___ Group collaboration
___ Games
___ Power Point Presentation
___ Answering preliminary
activities/exercises
___ Discussion
___ Case Method
___ Think-Pair-Share (TPS)
___ Rereading of Paragraphs/
Poems/Stories
___ Differentiated Instruction
___ Role Playing/Drama
___ Discovery Method
___ Lecture Method
Why?
___ Complete IMs
___ Availability of Materials
___ Pupils’ eagerness to learn
___ Group member’s
Cooperation in doing their tasks
Strategies used that work well:
___ Group collaboration
___ Games
___ Power Point Presentation
___ Answering preliminary
activities/exercises
___ Discussion
___ Case Method
___ Think-Pair-Share (TPS)
___ Rereading of Paragraphs/
Poems/Stories
___ Differentiated Instruction
___ Role Playing/Drama
___ Discovery Method
___ Lecture Method
Why?
___ Complete IMs
___ Availability of Materials
___ Pupils’ eagerness to learn
___ Group member’s
Cooperation in doing their tasks
Strategies used that work well:
___ Group collaboration
___ Games
___ Power Point Presentation
___ Answering preliminary
activities/exercises
___ Discussion
___ Case Method
___ Think-Pair-Share (TPS)
___ Rereading of Paragraphs/
Poems/Stories
___ Differentiated Instruction
___ Role Playing/Drama
___ Discovery Method
___ Lecture Method
Why?
___ Complete IMs
___ Availability of Materials
___ Pupils’ eagerness to learn
___ Group member’s
Cooperation in doing their tasks
F. What difficulties did I encounter
which my principal or supervisor
can help me solve?
__ Bullying among pupils
__ Pupils’ behavior/attitude
__ Colorful IMs
__ Unavailable Technology
Equipment (AVR/LCD)
__ Science/ Computer/
Internet Lab
__ Additional Clerical works
__Reading Readiness
__Lack of Interest of pupils
__ Bullying among pupils
__ Pupils’ behavior/attitude
__ Colorful IMs
__ Unavailable Technology
Equipment (AVR/LCD)
__ Science/ Computer/
Internet Lab
__ Additional Clerical works
__Reading Readiness
__Lack of Interest of pupils
__ Bullying among pupils
__ Pupils’ behavior/attitude
__ Colorful IMs
__ Unavailable Technology
Equipment (AVR/LCD)
__ Science/ Computer/
Internet Lab
__ Additional Clerical works
__Reading Readiness
__Lack of Interest of pupils
__ Bullying among pupils
__ Pupils’ behavior/attitude
__ Colorful IMs
__ Unavailable Technology
Equipment (AVR/LCD)
__ Science/ Computer/
Internet Lab
__ Additional Clerical works
__Reading Readiness
__Lack of Interest of pupils
__ Bullying among pupils
__ Pupils’ behavior/attitude
__ Colorful IMs
__ Unavailable Technology
Equipment (AVR/LCD)
__ Science/ Computer/
Internet Lab
__ Additional Clerical works
__Reading Readiness
__Lack of Interest of pupils
G. What innovation or localized
materials did I use/discover which I
wish to share with other teachers?
Planned Innovations:
__ Localized Videos
__ Making use big books from
views of the locality
__ Recycling of plastics to be used
as Instructional Materials
Planned Innovations:
__ Localized Videos
__ Making use big books from
views of the locality
__ Recycling of plastics to be used as
Instructional Materials
Planned Innovations:
__ Localized Videos
__ Making use big books from
views of the locality
__ Recycling of plastics to be used as
Instructional Materials
Planned Innovations:
__ Localized Videos
__ Making use big books from
views of the locality
__ Recycling of plastics to be used as
Instructional Materials
Planned Innovations:
__ Localized Videos
__ Making use big books from
views of the locality
__ Recycling of plastics to be used as
Instructional Materials
__ local poetical composition
__Fashcards
__Pictures
__ local poetical composition
__Fashcards
__Pictures
__ local poetical composition
__Fashcards
__Pictures
__ local poetical composition
__Fashcards
__Pictures
__ local poetical composition
__Fashcards
__Pictures