Download Digestive and Urinary Systems

Digestive and
Urinary Systems
Digestive System
We are going to talk about the digestive
system first! Glue the digestive system
diagram to the next blank page in your
notebook.
Hungry?
Here’s a piece of candy!
Don’t eat it yet!
Where does it go?
What do you think will happen to this
piece of candy in the digestive track?
The digestive system…
breaks down food!
The digestive tract includes the:
• Mouth
• Esophagus
• Stomach
• Small intestine
• Large intestine
Helping Organs
•
•
•
•
•
•
Teeth
Salivary glands
Tongue
Liver
Gallbladder
Pancreas
Mmmmm….
The digestive process begins
before food even enters the mouth.
As you were looking at these
pictures, the production of saliva
may have been triggered in your
mouth.
Hungry yet?
There are 2 types of digestion:
mechanical – food is
physically broken
down into smaller
pieces
chemical - food is
chemically broken
down by different
types of enzymes
Human Digestion Activity
You will receive a bag with a
piece of bread. Do no open
yet! You will work in partners.
Human Digestion Activity
This demonstration will show you how
your STOMACH works to break apart the
bonds holding the bread together through
chemical and mechanical digestion so that the
nutrients can be absorbed, how your LARGE
INTESTINE recovers water and vitamins from
the food, and how your RECTUM stores the
waste temporarily before it exits the body.
Human Digestion Activity
Open your bag now so we can pour
juice in it.
Once you have juice, close your
bag tightly and wait for
instructions.
Human Digestion Activity
Now, with the bag tightly
closed, squish the bread
with your fingers until all
of the pieces are really
small.
Human Digestion Activity
What does the squishing
represent?
Human Digestion Activity
mechanical digestion in
the stomach
Human Digestion Activity
What does the juice
represent?
Human Digestion Activity
chemical digestion in the
stomach
HCl Acid
Human Digestion Activity
Drain the liquid contents down the
sink by creating a small gap which
prevents the solids from escaping
and compare it with an undrained
sample. (poke a hole with your
pencil)
(Teacher will have the undrained sample)
Human Digestion Activity
What stage of digestion
does this represent?
Human Digestion Activity
water and vitamins are
reabsorbed by the large
Intestine
Human Digestion Activity
Put all of the contents
of the bag into the
garbage. What does
this represent?
Human Digestion Activity
waste is temporarily stored
in the rectum
FLOW MAP (10 mins)
Using what you have learned and your digestive
system diagram, create a flow map of the
process of digestion in your science notebook.
So….
The digestive system breaks down food,
gives it to the cardiovascular system,
which takes it to all body cells. The
cells then use the food (combined with
oxygen) to make ENERGY!
Urinary System
• produces, stores, and eliminates fluid wastes
• removes wastes from your blood
Kidneys
When you think urinary system, think kidneys!
Kidneys have special filters called nephrons
that filter the blood.
Urinary System Multi-Flow
Using page 215, create 3 cause-and-effect
flow maps. You will do one for each urinary
system problem: bacterial infections,
kidney stones, and kidney disease.