DIGESTIVE SYSTEM
What happens when we eat?
Warm Up
Answer the following questions on notebook paper.
I will be collecting this!
1.
What is the job of the digestive system?
2.
What organs are involved in the digestive system?
3.
How does the digestive system help you maintain
homeostasis?
4.
List one connection between the digestive system
and another body system we have learned about.
Announcements
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Connections Project (skeletal, muscular, respiratory
and circulatory systems) will be due on this Friday,
December 2nd.
If you do not have a copy of the rubric get it off my
webpage. You MUST turn in the rubric with the
project.
You will have a Science formative Monday,
December 5th . We will review on Friday.
Your next quiz (digestive) will be on Thursday,
December 8th.
Digestive system song
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Write out as many terms as you hear when the song
is playing.
Be able to explain how digestion takes place.
What happens when we eat?
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If you can behave, you will receive candy for this
activity.
If not, you will imagine you have candy for this
activity.
In pairs, you will briefly describe in your own words
what happens as you eat a piece of candy.
Describe what body parts are being used and what
happens at each step in the process of eating the
candy.
So what happens?
So now that we have ideas……
1.
2.
Share with one other group your ideas about what
happened once you ate the candy.
Lets share these ideas out as a whole group.
Now, what really happens……………
Jobs (yes, these are notes)
The digestive system does the following things:
 The digestive system breaks down food so it can be absorbed by
your body through the blood stream.
Steps
 Breaking down food is how nutrients get into our body to give us the
energy that we need to move.
 Our bodies are unable to directly dissolve food into the blood.
 Salivary glands and our teeth start the breakdown of food inside of
our mouths by using enzymes and mashing our food.
 Stomach churns the food and adds acid to break it down.
 The intestines absorb nutrients into the blood stream.
 Colon release waste from the body.
Parts
There are two main parts of the digestive system.
Upper digestive system: This is where food enters the
body and is broken down into smaller pieces for
absorption.
Lower digestive system: This is where food is absorbed
in the blood stream and the waste product is
removed in the body.
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Organs
Upper Digestive System:
esophagus, stomach, and duodenum
Lower Digestive System:
Small intestine- this includes the enzymes from your
pancreas, gallbladder and bile.
Large intestine- this includes your colon, rectum and
anus.
Project Time!
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You have the rest of today’s class period to work on
your project.
Its due Friday, so use this time wisely.
I will not give you all any more class time to work on
your projects!
This is also the time that you can use to ask me
questions if you are confused or need help!
Warm Up 12/1/11
Copy the following statements in your notebook.
Decide if these statements are true. If not true,
correct them.
1. The digestive system works with the respiratory
system to make cellular respiration possible.
2. Carbon dioxide is necessary for cellular respiration.
3. The digestive system is involved in the speech and
water removal.
Announcements
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We will be doing a lab today based on how well
we can behave.
Tomorrow we will be reviewing for our formative
test on Monday. Get ready!
YOUR PROJECTS (including the rubric) ARE DUE
TOMORROW!
Today is world AIDS day!
Good luck on your project!
Types of digestion
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1.
2.
There are two ways that food is broken down in the
human body:
Mechanical digestion
Chemical digestion
So what’s the difference?
Mechanical digestion
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This is when food is broken down into smaller pieces
in a physical way. (they literally get smaller).
The process of breaking down food is called
mastication.
Your teeth chew food so that you can swallow it.
Your stomach mashes and pounds the food you eat
through a process called peristalsis.
Chemical digestion
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This is when chemical changes actually change the
food we eat into different substances.
Our saliva has enzymes that break down food and
turn it into sugars or other forms.
Quick practice
Tell me if the following actions are mechanical or
chemical digestions:
1.
Biting into an apple.
2.
A piece of candy mixing with your saliva
3.
Chewing a piece of candy.
4.
Your stomach mashing and pounding food you just
ate.
Bread Lab (25)
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We will get into groups of 4
We will see the differences in digestion as we do
the lab.
Once you are done complete the reflection
questions.
Since we can’t behave
Your assignment is:
 Turn to page B45. Copy the vocabulary words with
the definitions.
 Copy the picture of peristalis on page B46 with the
definitions.
Reflection ?’s
1.
2.
3.
4.
5.
6.
7.
8.
9.
What did the ziploc bag represent?
What did the bread represent?
What happened when you added the liquid substance to
the sandwich bag?
Did this make mashing the bread easier or more difficult?
Why do you think mashing the bread is easier with a
liquid?
How do you think the bag and bread relate to digestion in
humans?
What happened when you added the substance?
When you broke the bread apart with your hands which
type of digestion is it?
When you added the liquid which type of digestion is it?
Warm Up 12/2/11
Describe what happens when you eat food in a
paragraph or more.
Be sure to use the at least 3 words out of the word
bank:
mastication, digestion, peristalis, absorption, blood
stream, mechanical digestion, chemical digestion
Announcements
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Today we will review for formatives! Your formative
will be on Monday.
You will also get a notebook check on Monday.
Make sure you update your notes so that you get a
good grade 
Get ready for your quiz on the digestive system
next week (Thursday)!
We will be having a JMMS science fair. I will give
you updates when they become available!
PROJECTS DUE TODAY!
Review for formatives today
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You will receive a list of questions.
You will answer the questions in pairs or individually
(depending on behavior).
Once we are done practicing the information we
will play a review game for the last couple of
minutes in class. Depending on our behavior.
Remember, you are taking the formative on
Monday, so review as much as you can!
As you review, if you see your missing notes update
them. You will be graded on your notebook.
DIGESTIVE CONTINUED
Warm Up 12/7/11
1.
2.
3.
What is the job of the salvia in our mouths
within the digestive system?
What is the job of the stomach?
If I were to eat a carrot, what organs would be
involved in digesting it?
Announcements
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See the board for the new locker policy.
If you did not finish your formative test yesterday
you will do so during today’s lesson. That means you
will need to come during Cougar Time on Friday to
make up your work.
Quiz Friday @ the beginning of class.
Progress Reports go out. Check the no name folder
(if your paper is there, it’s a zero)
Check wiki page for all homework assignments. Its
updated on Tuesdays 
Digestive system recap:
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The main job of the digestive system is to break
down food so that it can be absorbed into the body
through the bloodstream.
Organs of the digestive system include but are not
limited to the mouth, esophagus, stomach, small and
large intestine.
The digestive system helps us to maintain
homeostasis because makes sure that our cells are
able to get nutrients that are necessary to have
energy. Without this energy the body would shut
down because it could not function.
Digestive and Homeostasis?
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Today’s lesson will explore what happens when our
digestive system is compromised.
We will look at several diseases in order to learn
what happens when the digestive system is not in
balance (that is, maintaining homeostasis).
Make sure you are taking good notes as this
assignment will be a quiz grade!
Articles for Stations
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You will read different articles and watch different
videos about diseases that attack our immune
system.
Your job is to gather information to fill in your table!
Answer the questions for each article on YOUR side
of your notebook.
Stations
Disease
Station 1
Station 2
Station 3
Station 4
Station 5
What does it do to
the digestive
system?
How it affects a
person?
What happens to
your body’s ability
to maintain
homeostasis?
Anorexia
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http://www.youtube.com/watch?v=JixbTHj6FKY
http://player.discoveryeducation.com/index.cfm?gui
dAssetId=9F8F1BE4-0B19-446F-B0DC7F1A92CE5BDB&blnFromSearch=1&productcode=
US
Warm UP 12/08/11
1. Main job of the digestive system?
2. List at least 5 organs present in the digestive system?
3. Think back to one of the stations from yesterday.
Describe how the disease prevented an individual
from maintaining homeostasis.
Announcements
Homeostasis
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What is it?
Why is it important?
What happens if we don’t have it?
Connections
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Think about the role of the digestive system in your
body.
With a partner, discuss how the digestive system
works with other body systems to maintain
homeostasis.
The pair with the most CORRECT connections wins a
prize!
Video (if we can’t behave we wont
watch it!)
Jot at least 15 facts down on your paper.
You will need this information later 
Independent Practice
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1.
2.
3.
You will be making a brochure that describes a
digestive disease.
In this brocuhure you MUST do the following:
Explain how the disease prevents you from
maintaing homeostasis.
Describe at least 1 other body system that is
connected to the problem. Be sure to explain how
and why there is a connection
What you can do to prevent or correct the
disease.
Warm Up
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Review for your digestive system quiz.
If its loud, I shut it down 
Announcements
Pre Test
Be sure to write this on Notebook paper I will collect
it. Label Pre-Test at the top.
1.
What is the job of the endocrine system?
2.
What organs are in the endocrine system?
3.
How does the endocrine system help us to maintain
homeostasis?
4.
What connections can be made between the
endocrine and other body systems we have
learned about.
Endocrine System
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I will play a song.
Be sure to jot down as much information as you can
about this system.
http://www.youtube.com/watch?v=05AFkD9ipqE&f
eature=related
What do all of these letters mean?
These are letters that represent hormones?
 The endocrine system is made up of glands that
secrete hormones.
So let’s learn more!
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Job
The endocrine system is a system of glands that
secrete different types of hormones into the blood
stream in order to regulate the body.
 Hormones regulate various human functions,
including metabolism, growth and development,
tissue function, and mood.
 An easy way to remember:
Greek words "endo" meaning inside, within, and
"crinis" for secrete
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Why do we need it
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The endocrine system is an information signal system
that gives the body different messages in an effort
to regulate itself.
Different hormones serve different purposes. For
example, the hormone insulin is responsible for
regulating blood sugar. If your gland (the pancreas)
does not secrete this hormone properly your body
cannot maintain homeostasis. Some people develop
diseases such as diabetes as a result.
Think-pair-share
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Think back to health class. What other hormones do
we have in our bodies. What do they do? (3
minutes)
In pairs, discuss your ideas.
Let’s share out whole class.
Guided Practice
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http://player.discoveryeducation.com/index.cfm?gui
dAssetId=9B34BE7E-3B9F-424F-B018483C3CBD58EB&blnFromSearch=1&productcode=
DHC
Quiz
Answer the following questions on your side of your
notebook:
1.
Explain how the endocrine and digestive systems
are connected?
2.
Describe how the endocrine and circulatory
systems are connected? What role does the blood
stream play?
3.
Based on your knowledge from the video, give a
specific example of the glands regulating the
body.
Warm up 12/12/11
“Glands are an important tool that the body has to
regulate itself.”
Defend the claim stated above.
Announcments
Parts of the endocrine system
Glands
Examples: salivary gland, exocrine gland, sweat
glands.
Organs such as the liver, kidneys, heart secrete
hormones just like glands
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