Digestion Assignment
Label the Digestive System
1. Read the definitions below, then label the digestive system anatomy diagram.
anus - the opening at the end of the digestive system from which feces (waste) exits the body.
appendix - a small sac located on the cecum.
ascending colon - the part of the large intestine that run upwards; it is located after the cecum.
cecum - the first part of the large intestine; the appendix is connected to the cecum.
descending colon - the part of the large intestine that run downwards after the transverse colon
and before the sigmoid colon.
duodenum - the first part of the small intestine; it is C-shaped and runs from the stomach to the
jejunum.
esophagus - the long tube between the mouth and the stomach. It uses rhythmic muscle
movements (called peristalsis) to force food from the throat into the stomach.
gall bladder - a small, sac-like organ located by the duodenum. It stores and releases bile (a
digestive chemical which is produced in the liver) into the small intestine.
ileum - the last part of the small intestine before the large intestine begins.
jejunum - the long, coiled mid-section of the small intestine; it is between the duodenum and the
ileum.
liver - a large organ located above and in front of the stomach. It filters toxins from the blood,
and makes bile (which breaks down fats) and some blood proteins.
mouth - the first part of the digestive system, where food enters the body. Chewing and salivary
enzymes in the mouth are the beginning of the digestive process (breaking down the food).
pancreas - an enzyme-producing gland located below the stomach and above the intestines.
Digestion Assignment
Enzymes from the pancreas help in the digestion of carbohydrates, fats and proteins in the small
intestine.
rectum - the lower part of the large intestine, where feces are stored before they are excreted
from the body.
sigmoid colon - the part of the large intestine between the descending colon and the rectum.
stomach - a sack-like, muscular organ that is attached to the esophagus. When food enters the
stomach, it is churned in an acid bath.
transverse colon - the part of the large intestine that runs horizontally across the abdomen.
(Complete the following chart using p.265)
Enzyme
Produced by
Salivary amylase
Salivary
glands
Site of
Action
Mouth
Optimum
pH
Neutral
Digestion
Starch + H2O  Maltose
Pancreatic
amylase
Maltase
Pepsin
Trypsin
Peptidases
Nuclease
Nucleosidases
Lipase
2. Now go back to your diagram, and add information about the 9 digestive enzymes on
p.265 of your textbook (Table 14.3). Use a different colour for each enzyme. Write the
name of the enzyme on the side of the diagram, draw an arrow TO the enzyme name
from where it is produced. Then draw another arrow to the site of that enzyme’s action.
http://www.enchantedlearning.com/subjects/anatomy/digestive/label/
Digestion Assignment
mouth
esophagus
liver
stomach
stomach
Gall bladder
duodenum
Ascending colon
ileum
stomach
cecum
stomach
Appendix
anus
Pancreas
Transverse colon
Descending colon
Jejunum
Sigmoid colon
rectum
Assignment: You will complete this IN CLASS on Tuesday using your notes (no textbook
allowed).
Explain how your body digests the major components of a hamburger from mouth to small
intestine.. The patty contains mainly protein and lipids. The bun contains mainly starches. All
parts have nucleic acids. For each of the major categories of biological molecules
(carbohydrates, protein, lipids and nucleic acids), track the enzymatic digestion from start to
finish, as well as the function of each of the 17 parts of the digestive system in the diagram. You
should include all 9 enzymes from p.265, including their site of production and site of action.
Digestion Assignment
Enzyme
Produced by
Site of
Action
Mouth
Optimum
pH
Neutral
Digestion
Salivary amylase
Salivary
glands
Basic
starch + H2O  maltose
Pancreas
Small
intestine
Maltase
Small
intestine
Small
intestine
Basic
Maltose + H2O  glucose +
__________________glucose
Pepsin
Gastric
glands
Stomach
Acidic
Protein + H2O  peptides
Trypsin
Pancreas
Small
intestine
Basic
Protein + H2O  peptides
Peptidases
Small
intestine
Small
intestine
Basic
Peptide + H2O  amino
acids
Nuclease
Pancreas
Small
intestine
Basic
RNA + DNA + H2O 
nucleotides
Nucleosidases
Small
intestine
Small
intestine
Basic
Nucleotides + H2O  base +
sugar + phophate
Lipase
Pancreas
Small
intestine
Basic
Fat droplet + H2O  glycerol
+ fatty acid
Pancreatic
amylase
starch + H2O  maltose
Digestion Assignment
Name of Student _____________________________
Microtheme __Digestion of a Hamburger___
Science Content
o Accurate
o Complete/sufficient detail provided
o Uses appropriate scientific
vocabulary
o Uses appropriate examples and/or
diagrams
— detail should reflect high-school
level
— use of biological terms enhances
thewriting (correct use of terms,
doesn’tdetract from flow)
Comments
Possible Points
5 — met all criteria
3–4 — met most criteria
1–2 — met few criteria
Score ________________
Task Completion
o Task completed effectively (e.g.,
explanation given, question
answered, argument made, point of
view represented)
— last paragraph should provide a
concise summary of problem and
solution, statement of
recommendation, etc.
Additional criteria related to
specific microtheme:
o all 9 enzymes included

Enzyme name

Site of production

Site of action

digestion
o all 17 parts of the digestive system
included

name

main function
o all 4 biological molecules included

name

complete digestion from
mouth to small intestine

digestion of each molecule
explained in correct order

BONUS: what type of
general reaction are all of
the digestive enzymes
facilitating?
Possible Points
5 — met all criteria
3–4 — met most criteria
1–2 — met few criteria
Communication
o Communicates effectively (spelling,
grammar, flow)
o Format or voice appropriate to the
task
or audience
— clear sentence structure
— writing is clear and unambiguous
— no spelling or grammatical errors
Possible Points
5 — met all criteria
3–4 — met most criteria
1–2 — met few criteria
Comments
Score ________________
Comments
Score ________________
Overall Score
/15
Digestion Assignment