WELCOME TO SCIENCE
CLASS
Opening
Prayer
Class Rules
RESPECT yourself , your peers and your teachers.
 Complete your work on time and with care
 Come to class prepared to learn
 Do not prevent others from learning
BE RESPONSIBLE
It is your responsibility to express your energy through your learning
and not through poor behavior.
 Avoid teasing or bullying others
 Do not Speak out of turn
 Do not Use profanity
 Do not break the rules Intentionally (e.g Being Disrespectful)
BANANA DANCE
BANANA DANCE
Peel Banana, Pee, Peel, Banana
Cut Banana, Cut, Cut, Banana
Eat Banana , Eat, Eat Banana
Shake Banana, shake, shake
Banana
Digest Banana, Digest Banana
FUN WAYS TO THINK
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ESOPHAGUS
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INTESTINE
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ANUS
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RECTUM
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STOMACH
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GALLBLADDER
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MOUTH
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DIGESTION
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EXCRETION
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INGESTION
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ASSIMILATION
Activity
DEPARTMENT OF EDUCATION
SAN RAMON HIGH SCHOOL
RAPU RAPU NATIONAL HIGH SCHOOL EXTENSION
SAN RAMON , RAPU RAPU ALBAY
DIGESTIVE
SYSTEM
Prepared by
RODEN B. ORTEGA
Teacher 1
The Digestive System Parts and
Functions
DIGESTIVE SYSTEM
A series of connected Organs whose
Purpose is to Break Down , Or
digest, the food we eat.
Digestion is the process by which
food is broken and dissolved so
that it can be taken into the blood
to be used by the body.
Alimentary Canal
Alimentary Canal
Alimentary Canal
Alimentary Canal
Mouth
Large intestine
pharynx
Small intestine
esophagus
Rectum
stomach
Anus
MOUTH
Responsible for the
intake of food.
In your mouth, the
solid food is broken
down into small pieces
by the chewing action
of the teeth
ESOPHAGUS
It is muscular tube that connects the
mouth with the stomach .
It moves food from the throat to the
stomach
ESOPHAGUS
It is muscular tube that
connects the mouth with the
stomach .
It moves food from the throat
to the stomach
Peristalsis
Series of involuntary
wave –like Muscle
contractions in the
esophagus that help move
the food down to the
stomach
stomach
J-shaped muscular bag
that stores the food you
eat and breaks it down
into tiny pieces.
stomach
J-shaped muscular bag that
stores the food you eat and
breaks it down into tiny pieces.
Small intestine
A narrow , twisting
tube that performs
the majority of
digestion and
absorption of
nutrients
large intestine
Large intestine forms an
inverted U over the coils of
the small intestine.
It absorbs water and mineral
salt from undigested food
material .
Rectum
It is a short muscular tube and a
short term storage which holds
feces before it is expelled.
Anus
An external opening surrounded by
sphincter muscles and where waste
is eiminated
Accessory organs
Accessory organs
Accessory organs
Accessory organs
Liver
Pancreas
Gall bladder
liver
It is a dark redbrown organ with
soft spongy
texture.
It aids digestion
by producing a
digestive juice
called bile
Gall bladder
Is a green –yellow bag
attached to the liver.
Stores bile from a liver
, releases it into the
small intestine .
Pancreas
It’s a soft triangular
gland lying between
the small intestine
and the stomach .
It produces pancreatic
juice which helps to
break down fats,
starch, and protein.
Why is the digestive system important?
The process of digestion turns your food into
nutrients which are needed to function and survive. Your
body uses nutrients for energy, growth and cell repair.
Further, research has shown that your digestive system
can affect mood and overall mental health due to the
strong connection between the digestive system and the
brain.
Here are some tips to keep your digestive system healthy:
Eat healthy foods — For your digestive system this means eating
plenty of fruits, vegetables and both insoluble and soluble fiber.
Soluble fiber found in foods like oat bran, barley, nuts, seeds, and
beans helps your digestive system absorb water. Insoluble fiber found
in foods like wheat bran, vegetables, and whole grains keeps
everything moving through your digestive tract.
Stay hydrated — Drinking plenty of water helps your digestive system
function smoothly. Typically, it’s recommended that women drink 2.7
liters of water per day, and that men drink 3.7 liters per day.
Take probiotics — Probiotics are the good bacteria in your
stomach. They can be added to your diet by eating yogurt,
fermented foods or can be consumed in daily supplements.
Get moving — Exercise increases blood flow and metabolism
for smoother digestion.
See a doctor — If you experience digestive problems regularly,
it’s important to see a doctor who can help track your digestive
health and manage your symptoms.
CRITERIA
Score
TEAMWORK. All members helped in the
preparation of the presentation.
LANGUAGE. Presenter used the target language
during the presentation.
RELEVANCE. The target goals were accomplished.
DEPORTMENT. The Group observed proper
behavior and health protocol during the activity.
Total
15
40
35
10
100
Thank
You
Assignment
In your activity notebook
• Describe what is colon cancer
• Cite how this disease can be
diagnosed.
• How to prevent and how to treat.
DIGESTIVE
SYSTEM
https://www.storyboardthat.com/storyboard
s/pratha_102685/digestive-system-comicstrip
ARRANGE ME IF YOU CAN
ARRANGE ME IF YOU CAN
Arrange and explain
Arrange the word in sequence to show the path of food during digestion and explain
OBJECTIVES
AT THE END OF THE LESSON STUDENTS ARE
EXPECTED TO:
1. Identify the organs that make up the
digestive system;
2. Give the function of each organ;
3. Explain ingestion, digestion, absorption,
assimilation, and excretion.
The Digestive System Parts and Functions
Digestion is the process by which food is broken and dissolved so
that it can be taken into the blood to be used by the body.
The parts of the digestive system are the mouth, esophagus,
stomach, small intestine, large intestine, rectum, and anus.
Other parts of the digestive system are the salivary glands, liver, gall
bladder, and pancreas that produce fluids needed in the digestion of
the food you eat. The following are the functions of each part:
There are 2 kinds of digestion.
1. Mechanical Digestion- is the physical break down of food
into smaller pieces. It takes place as the food moves down
the digestive tract via peristalsis. Peristalsis is the rhythmic,
involuntary contraction of the smooth muscles.
2. Chemical Digestion – involves the breaking down of food
chemically into simple nutrients that can be used by the
cells.
Mouth
The mouth receives the food you eat. Inside
the mouth are the tongue and teeth. The
tongue moves the food so that the teeth can
chew it well. The first step in digestion
involves biting, cutting, and chewing of the
food. As you chew, the salivary glands
produce saliva, which is a digestive juice. As it
mixes with the chewed food, some of the
nutrients of food is changed to sugar
Esophagus
From the mouth, the food passes
through a long tube called the
esophagus. The walls of the
esophagus are made up of muscles.
These muscles move in a wavelike
motion to squeeze and push the food
down to the stomach. This muscular
movement is known as peristalsis.
Stomach
The stomach has many small glands
along its walls. These glands release
enzymes, hydrochloric acid, and
water, which all combine to form
gastric juice. The enzymes found in
the gastric juice breaks down the
proteins in the food. As peristalsis
mixes the food, it also pushes the
food toward the small intestine.
Liver
The liver produces bile, that helps digest
fats. The bile goes into the gall bladder
before proceeding to the small intestine.
Pancreas
The pancreas produces pancreatic juices
which digests carbohydrates, fats and
proteins. The juices then go to the small
intestine.
Small intestine
The small intestine is a narrow
coiled tube connected to the
stomach. Final digestion of
carbohydrates, fats, and proteins
in the food happens here. The
digested food then combines
with the blood.
Large intestine
This is a large, coiled tube
attached to the small intestine. It
is about two meters long. It is
twice as wide as the small
intestine. The undigested food
goes to this part of the digestive
system. Excess water is squeezed
from it. A soft solid waste is
temporarily stored here.
Rectum
The movement of the walls of
the large intestines pushes the
waste into this part. It serves as
the passageway of undigested
food coming from the large
intestine to the anus. Anus This is
an opening where waste comes
out of the body