DO%20NOW

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DO NOW
Date 12/08
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.

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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
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Digestive System Notes

• Glue Note Sheet to pg 84

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Digestion Presentation

• Use your sheet to complete notes on the
  Digestive System.
• Digestion Prezi

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Mechanical vs Chemical Digestion

• Video

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VENN DIAGRAM

• Draw the following Venn Diagram in your notebook
  on page 85. Use the following information to
  fill it in.

Mechanical Digestion Chemical
Digestion
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Mechanical Digestion

• Mechanical digestion is the physical break down
  of food into smaller pieces.

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Mechanical Digestion

• EXAMPLE
• CHEWING!

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Mechanical Digestion

• EXAMPLE

Peristalsis The squeezing of muscles in the
digestive system which forms a wave that moves
food along.
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Chemical Digestion

• Chemical Digestion is the chemical break down of
  foods into smaller molecules.

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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.
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Chemical Digestion
Notice how the large molecule only break apart
into smaller pieces. The shapes and colors do
not change. They simply detach from one another.
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DO NOW
Date 12/09
Give one example of Mechanical Digestion and one example of chemical digestion.

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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.
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Digestion Lab Set-Up

• A- Lab Clean Up Director
• B- Beaker Manager
• C- Lab Director
• D- Materials Manager

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Digestion Lab

• Materials Managers
• 1 Beaker
• 150 mL of Cola (Phosphoric Acid-H3PO4)
• 1 Ziploc bag
• 5 crackers
• 1 filter paper
• If you have a gluten allergy, see your teacher
  for a rice cracker.

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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.

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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.

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VIDEO

• Digestive System

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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.

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Exit Ticket

• Complete the questions on the back of your lab
  sheet.
• Glue or tape it in to page 86

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DO NOW


Date 12/10 12/11
Describe the following as a chemical or mechanical (physical) change? Food being chewed by teeth Food being broken down by the muscles of the stomach Saliva breaking down food during chewing Stomach acid and enzymes breaking down food in the stomach
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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.
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ENGAGE

• Why do we eat food?
• -TURN AND TALK
• -Be prepared to share

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EXPLORE Meet Your Food JIGSAW

• EXPERT GROUPS
• A- Report to Table 2/9
• Hamburger Patties (Protein)
• B- Report to Table 3/8
• Hamburger Buns (Carbohydrates)
• C- Report to Table 4/7
• Cheese (Fats)
• D- Report to Table 5/6
• Lettuce and Tomato (vitamins/minerals)

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EXPLORE

• EXPERT GROUPS
• Read the information assigned to your group.
• Answer the following questions on page 71 in your
  notebook and prepare to share your information
  with others.
• 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?

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TAPE TO PAGE 87
NUTRIENT Large Molecule Small Molecule Where it is Digested
Lettuce and Tomato (Vitamin and Mineral)
Beef Patty (Protein)
Cheese (Fats)
Bun (Carbohydrates)
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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
• (LETTUCElt PATTYlt CHEESElt BUN)

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EXPLAIN

• Digestion Online Simulation
• You will use the online simulation to complete
  the Journey Through the Digestive System
  Graphic Organizer
• Voice Level 1 as you work
• Glue into page 88

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ELABORATE

• QUESTION Can ENZYMES and STOMACH ACID really
  digest large protein molecules into smaller AMINO
  acids.
• PROTEIN DIGESTION LAB
• -Read the first page carefully
• -Complete the pre-lab quiz
• -Put your Protein investigation sheet in your
  folder for Friday

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Digestion Lab Set-Up

• A- Lab Clean Up Director
• B- Test Tube Manager
• C- Lab Director
• D- Materials Manager

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DO NOW


Date 12/7 Complete in your notebook on page
You are a doughnut. From the point of view of a doughnut, write a short story about how you would be eaten and digested by a human being. Use the following words in your story Mouth Enzymes Esophagus Stomach acid Stomach Saliva Small intestine Carbohydrate Large intestine Glucose (sugar) Absorbed
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ESSENTIAL QUESTION How do the structures of the excretory system work to rid your body of waste?
OBJECTIVES -Excretory system notes to record the structures and functions of the excretory system
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Reminders

• Take out your homework and make a pile for the
  aisle.

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Excretory System

• Tape your notes page into page 89.
• Use the following slides to to fill in the
  diagram with information about the structures and
  function of the excretory system.
• You will color it when finished.

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The Human Excretory System

• The function of the excretory system is the
  excrete (get rid of) wastes that are not helpful
  to the body.

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Waste

• Wastes that are removed include carbon dioxide,
  water, salt, urea and uric acid.
• All excreted wastes travel at some time in the
  blood.

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Structures of the Excretory System

1. Skin
2. Lungs
3. Liver
4. Large intestine
5. Urinary System

• Think Pair Share
• Can you guess how these structures are a part of
  the excretory system?

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Skin

• Wastes such as excess water, salt, urea and uric
  acid are removed from the body in sweat.

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Lungs

• Excess carbon dioxide waste is removed from the
  body when we exhale.

CO2
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Liver

• The liver is a part of what other system?
• The digestive system

Liver
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The liver has many functions, including (but not
limited to)

• to produce substances that break down fats
• produce urea (the main substance of urine)
• make certain amino acids (the building blocks of
  proteins)
• filter harmful substances from the blood (such as
  alcohol)
• The liver is also responsible for producing
  cholesterol. It produces about 80 of the
  cholesterol in your body.

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The Liver and Waste

• The liver produces urea and uric acid as a
  by-product of the breakdown of proteins.
• Urea and uric acid are sent to the kidneys to be
  processed.

Liver
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Large Intestine

• The large intestine removes solid, undigested
  food from the body after it passes through the
  digestive system.
• Waste is stored in rectum until it is excreted
  from the body as solid waste.

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The urinary system

• The kidneys filter the blood to form urine, which
  is excess water, salt, urea and uric acid.
• Read about the urinary system and fill in the
  table as you go.

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Excretory System

• EXcretory System
• EXits the body

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Exit Ticket

• Answer the questions at the end of your notes
  sheet.
• Tape into page 90 (if you havent already.)