https://www.youtube.com/watch?v=b20VRR9C37Q
Figure 1. Structure of Villus
Amylase
Protease
Lipase
Example of
this Enzyme
Salivary
Amylase
Pepsin
Pancreatic
Lipase
Source
Salivary
Glands
Wall of
Stomach
Pancreas
Substrate
Starch
Proteins and
peptides
Triglycerides
And
phospholipids
Maltose
Small
Polypeptides
Fatty Acids
and Glycerol
7
1.5
7
Products
Products
Optimum
pH
Optimum
pH
pancreas secretes
lumen of the
small intestine.
Figure 2. Intestinal Structure
Figure 3. Arrangement of cells and ducts in a part of the
pancreas that secretes digestive enzymes
Figure 4. The Human Digestive System
Structure
Function
Mouth
Voluntary Control of Eating . Mechanical digestion
of food by chewing and mixing with saliva, which
contains lubricants and enzymes that start starch
digestion.
Esophagus
Movement of food by peristalsis from the mouth
to the stomach
Stomach
Churning and mixing with the secreted water and
acid which kills foreign bacteria and other
pathogens in food, plus initial stages of protein
digestion.
Small Intestine
Final stages of digestion of lipids carbohydrates,
proteins, and nucleic acids, neutralizing stomach
acid, plus absorption of nutrients.
Pancreas
Secretion of lipase, amylase and protease
Liver
Secretion of surfactant in bile to break up lipid
droplets
Gall Bladder
Storage and regulate release of bile
Large Intestine
Reabsorption of water, further digestion carbs by
symbiotic bacteria , plus formation and storage of
feces.
https://www.youtube.com/watch
?v=Wu2iJseYlOQ
Figure 5. Peristalsis movement from
esophagus to small intestines
Figure 6. Detail structure of the small intestine
Figure 7. Structure of the an intestinal villus
Figure 8. Scanning electron micrograph of
villi in small intestine
Figure 9. Example of methods of absorption in the
small intestine
Figure 10. Lipid Absorption
Figure 11. Glucose Absorption
• Tapeworms sometimes infect humans, anchoring themselves to the wall of the small
intestines. Based on how digestion is compartmentalized along the mammalian alimentary
canal, what digestive functions would you expect these parasites to have?
• A single sandwich is likely to contain carbohydrates, lipids, and proteins. From a biochemical
viewpoint, what will happen to each molecule of digestion?
• You ingest glucose molecule in the starch of a breakfast cereal. State as many specific
locations as you can for this single glucose molecule from the time it is in your mouth to the
time it enters a muscle cell of your right forearm.
• Lastly, Using materials you provide from home, create a labeled model of all digestive system
structures beginning with the mouth and ending with the anus. Focus on the materials used
to demonstrate the physical structure of each organ or tissue. Be sure to include the
accessory organs too! (Rubric on next slide)
CATEGORY
4=A
Assignment #1:
Diagram or model
Digestion Diagram has all of the
following: structures present materials are
creatively linked to
the original
structure -final
product is neat and
well organized shows thought and
a clear
understanding of
the digestive
process (score x6)
3=B
Diagram or model
has 3 of the
following: structures present materials are
creatively linked to
the original
structure -final
product is neat and
well organized shows thought and
a clear
understanding of
the digestive
process (score x6)
2=C
1= D
Diagram or model Diagram or model
has 2 of the
has 1 of the
following: following: structures present structures present -materials are
materials are
creatively linked to creatively linked to
the original
the original
structure -final
structure -final
product is neat
product is neat and
and well organized well organized - shows thought shows thought and
and a clear
a clear
understanding of understanding of
the digestive
the digestive
process (score x6) process (score x6)
Problems with the Digestive System
• Choose a specific problem with the digestive system from the list below. Create an interactive
poster on Glogster – (http://edu.glogster.com/) designed to educate patients with that
disorder to be given to the school nurse to share with other students.
Information that must be included in your Glog:
• Describe the Problem
• Causes
• Symptoms
• Treatments
• Those affected (if applicable)
• Questions with answers to age appropriate questions concerning this disorder
• Age appropriate diagrams and videos that help explain this disorder (at least one of each)
Choices of Digestive Disorders:
• Anorexia, Alactasia (lactose intolerance), achalasia, Anal fistula, Appendicitis, Bulimia,
Diverticulitis, gastric ulcer, Celiac disease, constipation, diarrhea, Cholelithiasis (gall
stones),Esophageal reflux, Hiatal hernia, gastritis, ileus, colorectal cancer, hepatitis,
cholecystitis, IBS (irritable bowel syndrome), pancreatitis, Crohn’s disease, volvulus, or an
approved digestive problem of your choice. (Rubric on next slide)
CATEGORY
Assignment #2:
Problems with the
Digestive System
4=A
3=B
-Source information is -Source information
clear for all content - collected for all
Makes excellent use of content with few
font, color, graphics, errors -Makes
effects, etc. to
excellent use of font,
enhance Glog -Covers color, graphics,
topic in depth with
effects, etc. to
details and examples - enhance Glog -Covers
Subject knowledge is topic and subject area
excellent -Met all
knowledge appears to
requirements and
be good -All
exceeded -Excellent requirements are met
Spelling and Grammar -Few spelling and
(score x7)
grammatical errors
(score x7)
2=C
1= D
-Source information -Very little or no
collected for all
information collected
content with some for all content with
errors -Makes use of many errors -Makes
font, color, graphics, use of font, color,
effects, etc. but some graphics, effects, etc.
distract from Glog
but some distract from
content -Covers topic Glog content -Covers
and subject area with topic and subject area
a few errors -One or with a few errors -Two
two requirements are or more requirements
not met -Few spelling are not met -Multiple
and grammatical
spelling and grammar
errors (score x7)
errors (score x7)
Assignment #3: A Day in the Life
• Using the digestive disorder studied in Assignment #2, write a one-page diary entry, in first
person, reflecting on what it would be like to have this disorder. How does this disorder affect
daily life? How does it affect what is eaten? What is done to overcome the symptoms of this
disorder? How does it affect your interaction with others? How does it affect your overall
mood and behavior?
• The diary entry must be submitted in Microsoft Word using 1 inch margins, 12 point, Times
New Romans Font, double spaced, and heading the paper with the title and your name. Use
spell and grammar check before submitting. (Rubric on next slide)
CATEGORY
4=A
Assignment #3: Narrative has all
A Day in the Life requirements- Diary Entry
Creative Focused on
assignment story
-Clear
organization Excellent
Spelling and
Grammar (score
x5)
3=B
2=C
1= D
Narrative is
Narrative is
Narrative is
missing one
missing some
missing
requirementsrequirements - requirements Creative Lacks creativity - Lacks creativity Assignment story Assignment
Assignment story
is apparent story is missing lacks empathy Good
connection to Lacks
organization person -Lacks organization One or two
organization - multiple spelling
spelling and
Many spelling and grammar
grammar errors and grammar
errors (score x5)
(score x5)
errors (score x5)
That’s All Folks !!!