- 5 labeled spray
bottles of water (salivary amylase, hydrochloric acid
& pepsin, bile salts, lipase & amylase & trypsin
& chymotrypsin, maltase & sucrase & lactase
& peptidase)
- small scissors labeled with tags on string (maltase
& sucrase & lactase & peptidase)
- large “nametags” for each part of digestive
tract (there are roles listed for 19 students you can
add more students to the intestine and stomach roles if
needed.) Things
to make ahead of time:
ALIMENTARY CANAL: Lay out two parallel lines of tape
on the floor, 3' apart and long enough for the class
to stand shoulder to shoulder on both sides of the parallel
lines (or you can use a section of the hallway or the
sidewalk outside)
FOOD PARTICLE: The food particle consists of several
wrapped lifesavers placed in snack-sized zip-lock bags.
2-3 of these are placed in wadded newspapers in each
small paper lunch bag.
2-3 of these are place in paper grocery bags with added
newspaper.
All of these are placed in a large plastic garbage bag
with enough newspaper to fill. Be sure there will be
enough candy to go around.
This bag is then taped or tied closed to complete the
food particle.
DIGESTION ROLES: Create labels out of index cards for
each organ and attach safety pins for attaching to their
shirt front. Cut out the instructions below –
use a paper cutter to trim the paper down the center,
then cut between the individual roles. Glue the instructions
on the back of each index card label, then use a marker
to write the name of the organ on the front of the card
for each player – make additional cards if more
than one student will have the same role or combine
roles for large intestine and small intestine and other
structures for fewer students. Gather “tools”
for their role and place them together with the labels.
Activity: Arrange the students
in a chain along the “alimentary canal”
in the order given. They should be wearing their label
and have their “tools”. Place the “food
particle” near the “tongue”. As the
food moves down the chain to the next student they should
narrate what they are doing and why.
Processing: When done, have
them review their roles as they eat the candy. Add in
problem solving questions: what if the food was all
starch (or fat, or protein) – what would change?
What if I had diabetes? Etc.
Adapted from the work of
Bobbin Cave at AccessExcellence@ the National Health
Museum http://www.accessexcellence.org/AE/AEC/AEF/1995/cave_digest.html
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