Digestive System 1 What are the general functions of the digestive system? Describe the specific functions of the following structures in the digestive system: Mouth Stomach Pancreas Liver Gall bladder Small Intestine 2 3 Large Intestine Small Intestine Liver Stomach Mouth Tongue Select colors from the drop down lists to identify these parts of the digestive system: Student Instructions: You will need Acrobat Reader 11 or later to complete this worksheet. We suggest you save regularly - your teacher will tell you which questions to answer and how to submit when you have finished. The fields with 0 and drop down lists are for Teacher use only. Name: Class: Date (mm/dd/yyyy): Total (75) Percent Bonus (25) Large Intestine Comments Black Blue Green Red Pink Purple
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Digestive System
1 What are the general functions of the digestive system?
Describe the specific functions of the following structures in the digestive system:
MouthStomachPancreasLiverGall bladder
Small Intestine
2
3
Large Intestine
Small Intestine
Liver
Stomach
Mouth
Tongue
Select colors from the drop down lists to identify these parts of the digestive system:
Student Instructions:You will need Acrobat Reader 11 or later to complete this worksheet. We suggest you save regularly - your teacher will tell you which questions to answer and how to submit when you have finished. The fields with 0 and drop down lists are for Teacher use only.
Name:Class:Date (mm/dd/yyyy):
Total (75) Percent
Bonus (25)
Large Intestine
Comments
Black
Blue
GreenRed
Pink
Purple
celiaclark
Line
4
Substancesadded
Substancesextracted
Physical-chemical state of food
Mou
thSt
omac
hSm
all i
ntes
tine
Larg
e in
test
ine
Clo
aca
In the diagram below, list all the substances that are added to, or extracted from, the frog’s digestive tract as food passes through. Also describe the state of the food at each stage.
5
7
9
In the frog’s mouth, what function do the vomerine teeth serve?
The stomach breaks down food in the following ways:
a. Where is pepsinogen produced?
b. What changes it into pepsin?
c. What is the function of pepsin?To break down proteins
What are the folds of the stomach lining called?
How does the digestive system avoid digesting itself?es and acid.
Mouth
Stomach
Small intestine
Large intestine
Humansl Frogs
6
8
10
Food is digested in two ways. Mechanical digestion physically breaks down food into smaller particles, while chemical digestion uses chemicals to break down individual nutrients.In the chart below, determine for both frogs and humans which types of digestion (chemical and/or mechanical) occur in each portion of the digestive tract.
a. How are nutrients passed from the small intestine to the liver?
b. Why are these nutrients passed to the liver?
Which part of the small intestine do bile and enzymes from the liver and pancreas enter?
How do the secretions from the liver and pancreas interact with each other in the small intestine?
a. Use the pencil tool to circle the most effective surface for absorption.
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13
14
b. Why is this more effective than the others?
a. What does the pancreas produce?
b. How do these products get into the small intestine?
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12
Digestive System • 5
How does bile get from the liver to the duodenum?duct
What is the function of bile?ch acid and activate enzymes.
16
17
Compare to humana. Where do feces exit in frogs?
b. In humans?
18
For further thought...
Why are some enzymes introduced into the digestive system in an inactive form?
For further thought...
A frog’s intestine absorbs toxins, such as venom in insects, along with nutrients. The liver then filters these toxins out. Why is this filtering so important?
Independent Study Unit
Why are vitamins B and K produced by bacteria in the large intestine and not in the stomach?
1 3
4
6
10
9
8
12
2
5
14
15
16
17
13
11
7
The Crossword
ACROSS1. This controls the opening of the
cloaca (9)5. It’s an endocrine gland and a
digestive organ! (8)8. In the liver, fats, sugars and amino acids
are stored as this (8) 10. Unused substances are expelled
as this (5)13. These are broken down by pepsin and
intestinal enzymes (7)14. This stores food and breaks it into small
particles (7)16. This process is completed in the small
intestine (9)17. Enzyme that forms from pepsinogen (6)
DOWN2. The canal where the large intestine narrows
(6)3. The large intestine empties into this (6)4. The largest gland in the body (5)6. Folds in the stomach (5)7. First section of the small intestine (8)9. These produce secretions in the stomach (6)11. Tube between mouth cavity and stomach (9)12. Bile is used to emulsify this substance (4)15. The pancreatic ducts empty into this duct (4)
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