SLM Digestive-System
SLM Digestive-System
SLM Digestive-System
QUARTER 4 – MODULE 1
1. 2. 3.
Guide Questions
1. Using the picture, how would you define each name?
2. Based from the activity, what is the lesson all about?
3. What do you think is the relevance of the activity?
Objectives:
At the end of this lesson, the learners should be able to:
a. identify the different digestive processes;
b. explain the process of ingestion;
c. describe the process of mechanical and chemical digestion; and
d. cite the importance of mechanical and chemical digestion.
DIGESTIVE SYSTEM 1
SCIENCE 8
QUARTER 4 – MODULE 1
Activity 2: Who Am I?
A. INSTRUCTIONS: Label the parts and give its function. Use the words found inside the box in labeling
your drawing.
B. INSTRUCTIONS: Observe the digestive maze below. Guess the correct name of the organ for each
number.
1. Start - _________
2. ______________
3. ______________
4. ______________
5. ______________
6. ______________
7. ______________
8. ______________
9. End - __________
DIGESTIVE SYSTEM 2
SCIENCE 8
QUARTER 4 – MODULE 1
The importance of the role of chemical digestion is to further degrade the molecular structure of the
ingested compounds by digestive enzymes into a form that is absorbable into the bloodstream.
o Carbohydrates turns into simple sugar (glucose)
o Proteins turns into amino acids
o Fats – turns into fatty acids and glycerides.
Mechanical digestion makes the food smaller to increase both surface area and mobility. It includes
mastication, or chewing, as well as tongue movements that help break food into smaller bits and mix food
with saliva.
DIGESTIVE SYSTEM 4
SCIENCE 8
QUARTER 4 – MODULE 1
The food in the first part of the small intestine (duodenum) is acted upon by secretions of bile from the liver,
insulin produced by the pancreas, and intestinal glands. Digested molecules of food are absorbed through the
small intestine. The walls of the small intestine contain many folds that are lined up with tiny fingerlike protrusions
called villi. These villi are in turn covered with even smaller protrusions called microvilli. These structures
increase the surface area through which nutrients are absorbed.
Peristalsis – Move the food along to the large intestine.
Chemical Digestion – Break the macromolecules into soluble with help of
o Pancreas - The pancreas secretes pancreatic juice which breaks down fats,
carbohydrates, and protein. It also releases insulin into the blood which regulates the
use of sugar in your body.
o Liver - The liver is located on the right side of the stomach, and it is the largest organ
of the digestive system. It produces bile which helps to break fats into smaller ones.
This bile is stored in the gallbladder, and it is released when food moves into the
small intestine.
Absorption, these nutrients pass through the walls of the intestine and into the bloodstream,
where they get transported to the different parts of the body. The undigested parts of food or
those that were not absorbed by the body move to the large intestine like cellulose of fruits and
vegetables.
Large intestine
The large intestine connects the small intestine to the anus, consisting of three regions known as cecum, colon,
and rectum. After food is digested, water is absorbed in the large system. Waste food or substances that need to
be removed from the body are stored here after water is absorbed. It also changes the undigested food into
semi-solid waste or feces which leave the body through the anus.
Chemical Digestion – There are no digestive enzymes, only bacteria.
Absorption – Mostly absorb water
Propulsion (peristalsis) – Moving it along
Defecation – Poo
GOOD JOB! I hope you have learned something about out Digestive
System.
ASSESSMENT:
A. INSTRUCTIONS: Complete the table by giving the right answer.
Type of
STAGES Description Organ Involved
Digestion
Ingestion mouth
DIGESTIVE SYSTEM 5
SCIENCE 8
QUARTER 4 – MODULE 1
Breaking food
Mechanical and
in soluble
Chemical
molecules
Taking digestion
Absorption products to the
bloodstream
Small intestines
Assimilation (cells of the
body)
Removal of
waste or Mechanical
undigested food
REFERENCE:
https://www.slideserve.com/carrie/the-digestive-system
SMILE (SIMPLIFIED MODULE INTENDED FOR LEARNING ENCOUNTERS) Learner’s Packet pg. 1-6
DIGESTIVE SYSTEM 6