DO NOW
Date:
12/07
The function of the digestive
system is to break down the
food we eat for nutrients.
Brainstorm as many
structures of the digestive
system as you can.
ESSENTIAL QUESTION:
How do the structures of the digestive system work
together to process the food you eat?
OBJECTIVES:
-Review
Presentation on the Digestive System
-Digestive system notes to record the structures
and functions of the digestive system
Digestive System Notes
Glue Note Sheet to pg
Digestion Presentation
Use your sheet to complete notes on the
Digestive System.
Digestion Prezi
Do NOW
What are the similarities and differences
between mechanical and chemical digestion?
Mechanical Digestion
Chemical Digestion
Mechanical Digestion
Mechanical digestion is the physical break down
of food into smaller pieces.
Mechanical Digestion
EXAMPLE:
CHEWING!
Mechanical Digestion
EXAMPLE:
Peristalsis:
The squeezing of muscles
in the digestive system
which forms a wave of
constriction that moves
food along.
Chemical Digestion
Chemical Digestion is the chemical break down
of foods into simple molecules.
Chemical Digestion
Example:
Enzymes in your saliva
and stomach begin
breaking up molecules in
your food.
Stomach acid
(Hydrochloric acid) also
breaks down fats,
proteins, and starch into
much simpler molecules
as shown in this diagram.
DO NOW
Date:
12/10
Write down this week’s TEK from the chalkboard
Write the following sentences and
fill in the blanks:
_________is an example of a
physical reaction because______.
_________is an example of a
chemical reaction because______.
ESSENTIAL QUESTION:
How do the mechanical and chemical digestion work
together to break down the food you eat?
OBJECTIVES:
-Complete
Digestive System Lab to demonstrate
and understand mechanical and chemical
digestion.
Engage: Digestion
1. Put one cracker into your mouth. Hold it in
your mouth for 10 seconds. Start recording
your observations on your sheet.
2. Start to slowly chew the cracker.
3. Swallow the cracker. Pay attention to the way
it feels to have the food travel down your
esophagus.
Turn and Talk
With your elbow partner:
Discuss which forms of digestion
(mechanical/chemical) were involved in eating
your cracker.
Be prepared to describe your thoughts with
the class.
VIDEO
Digestive System
Digestion Lab Set-Up
A- Lab Clean Up Director
B- Beaker Manager
C- Lab Director
D- Materials Manager
Digestion Lab
Materials Managers:
1 Beaker with 150 mL of Cola
1 Ziploc bag
5 crackers
1 filter paper
Digestion Lab
– Place 5 crackers into a sealable bag.
– Pour in 150 mL of cola into the bag and zip the bag
closed.
– Observe the crackers. Record any changes ln your
sheet.
– “Pump” the bag for three minutes.
– Observe and record what happens to the crackers
inside of the bag.
– Place filter paper on top of the beaker. Use the
rubber band to keep the filter paper in place.
– Using the spoon, slowly pour out the cola and
cracker mixture from the bag and into the filter
paper.
Exit Ticket
Complete the questions on the back of your
lab sheet.
DO NOW
Date:
12/12
Q: How are large molecules broken down during
digestion for the body to use?
Describe the following as a chemical or physical
change?
1) Food being chewed by teeth
2) Food being broken down by the muscles of
the stomach
3) Saliva breaking down food during chewing
4) Stomach acid and enzymes breaking down
food in the stomach
ESSENTIAL QUESTION:
How are large molecules broken down
during digestion for the body to use?
OBJECTIVES:
-“Meet Your Food” to understand the large
molecules that you eat.
- Complete online simulation to understand
how large molecules are broken down during
digestion for your body to use.
ENGAGE:
Why do we eat food?
-TURN AND TALK
-Be prepared to share
EXPLORE: “Meet Your Food” JIGSAW
EXPERT GROUPS:
A- Report to Table 1/5
• Hamburger Patties (Protein)
B- Report to Table 2/6
• Hamburger Buns (Carbohydrates)
C- Report to Table 3/7
• Cheese (Fats)
D- Report to Table 4/8
• Lettuce and Tomato (vitamins/minerals)
EXPLORE:
EXPERT GROUPS:
Read the information assigned to your group.
Prepare to share your information.
1)What large molecules are broken down when
you eat your assigned food?
2)Where is it digested in the digestive system?
3)What smaller molecules are formed when
the large molecule breaks down?
EXPLORE:
• Move back to your table group
BUILD YOUR HAMBURGER:
-Show your Hamburger Part to your table group
-Share the molecules on the back
-Place your Hamburger Part in the Center of the
table and share your information
(LETTUCE< PATTY< CHEESE< BUN)
EXPLAIN:
Digestion Online Simulation
You and a partner will use the online simulation
to complete the “Journey Through the
Digestive System” Graphic Organizer
Voice Level 1 as you work
ELABORATE:
QUESTION: Can ENZYMES and STOMACH ACID
really digest large protein molecules into
smaller AMINO acids.
PROTEIN DIGESTION LAB:
-Read the directions carefully
-Complete the pre-lab when your test tubes are
set up
-Voice Level 2
Digestion Lab Set-Up
A- Lab Clean Up Director
B- Test Tube Manager
C- Lab Director
D- Materials Manager
ESSENTIAL QUESTION:
How do the structures of the digestive system work
together to process the food you eat?
OBJECTIVES:
-Determine
-Digestive system notes to record the structures
and functions of the digestive system
Project Reminder
• Due TUESDAY December 18th!
EXIT TICKET:
• Pretend you are a green bean. Describe your
journey through the digestive track using as
many vocabulary words from your notes and
lab as possible.
• Underline the vocabulary words from this
lesson