Transcript The Digestive System With Slide Guide

Walk-In
• Take out notebook, folder, pencil box.
• Copy the question and answer in
sentences:
• What is the difference
between mechanical and
chemical digestion?
Answer
• Mechanical digestion breaks
food down by grinding and
chewing it.
• Chemical digestion breaks food
down by adding chemicals from
the body to it, to make a liquid.
The Digestive
System
In this activity, you
and your partner will…
1. Try to answer some questions about the digestive
system, to see what you may already know!
2. Label and color a diagram of the digestive organs.
3. Read and take notes about each part of the digestive
system.
Part A -Try to Answer!
Write your answer/best gues
on your sheet.
1. How long are your intestines?
2. How long are the intestines of a full grown horse?
3. How long does chewing take?
4. How long does swallowing take?
5. Food sloshes in the stomach. How long can this last?
6. How long does it take for food to move through the intestine?
7. Food drying up and hanging out in the large intestine can last how long?
8. How many pounds of peanut butter do Americans eat in a year?
9. How many pounds of chocolate do Americans eat in a year?
10. In your lifetime, your digestive system may handle how many tons of food?
Answers!
1. How long are your intestines?
25 feet
2. How long are the intestines of a full grown horse?
3. How long does chewing take?
4. How long does swallowing take?
89 feet
5-30 seconds
10 seconds
5. Food sloshes in the stomach. How long can this last? 3-4 hours
6. How long does it take for food to move through the intestine? 3 hours
7. Food drying up and hanging out in the large intestine can last how long? 18
hours to 2 days
8. How many pounds of peanut butter do Americans eat in a year? 700 million
pounds
9. How many pounds of chocolate do Americans eat in a year? 2 billion pounds
10. In your lifetime, your digestive system may handle how many tons of food? 50
tons of food
Part B -Parts of the
Digestive System
Label your diagram as it is indicated on your
sheet. DO NOT COLOR UNTIL YOU ARE
DONE WITH THE REST OF YOUR SHEET!
• Teeth/Mouth
• Esophagus
• Stomach
• Small Intestine
• Large Intestine
• Pancreas
• Liver
• Gallbladder
• Rectum
Part C - The Digestive
System
o Function: moves and breaks down food into
smaller, usable nutrients.
o Nutrients: the body needs to absorb different
nutrients in order to function
o Proteins
o Carbohydrates
o Fats
o Water
o Vitamins
o Minerals
Part D -Types of
Digestion
o Chemical - Chemical changes actually change the
food into different substances
o Chewing a cracker – the cracker is broken into smaller
pieces and the saliva in our mouth produces a chemical
change – the starches in the cracker are changed to sugars
o Mechanical - The physical process of breaking food
into smaller pieces.
o Chewing food, stomach mashing and pounding food during
peristalsis.
Part E –Organs of
the Digestive
System
o Read each slide carefully.
o Write down the main function for
each part of the digestive
system.
Mouth
Teeth grind and spit
breaks up food
Salivary glands secrete 1-2 liters of spit a
day
Esophagus
Moves food to stomach
through peristalsis
Peristalsis- the muscular action of material moving through the
digestive system by wave-like action of smooth muscles.
Stomach
Chemicals break down the
food
The stomach is lined with a thick mucus so the stomach acid does
not eat away at itself.
Small Intestine
Absorbs nutrients
22 feet long
Villi (small structures in the small intestine) contain folds that
absorb the nutrients.
Large Intestine
Absorbs water
Most of the solid material (poo) that remains is compacted and
stored.
Liver
Filters blood & produces
bile
Go Rattlers!
Bile is a chemical that helps break down food.
Pancreas
Produces insulin and
glucagon
Without these chemicals from your pancreas your body would die
of starvation.
Gallbladder
Stores bile made by the
liver; secretes bile to
small intestine
Rectum
Stores feces (solid waste
product)
THE
END
If you are finished with your writing…
• Now color code the digestive system diagram.