materials6 funnels/cardboard tubes6 droppersCupsFoodFood coloringBagsHosePaper towels

Warm-up Write the question and the answer you

choose. How do the respiratory and circulatory

systems work together?a. The respiratory system takes in carbon dioxide,

while the circulatory system delivers it to the cells.b. The circulatory system takes in carbon dioxide,

whiles the respiratory system delivers carbon dioxide to the cells.

c. The respiratory system takes in oxygen while the circulatory system delivers oxygen to the cells.

d. The circulatory system takes in oxygen, while the respiratory system delivers oxygen to the cells.

RULESIf you get out of your seat, you

will be removed from the class.If I am talking, you ARE NOT.The materials are not for playing

but for learning. You have guided notes that must

be filled in as we move through the lab.

Let’s make poop!In your group, mash the food in

your cup with your utensil

Add couple of drops of water

What do you think this represents?

Step 1: The MouthDigestion begins in the mouth

Saliva (spit) contains an enzyme called amylase which starts breaking down the food.

Making poop continuedFunnel the food in your cup into

your cardboard tube

One person needs to push the food down the cardboard into the baggy

Knead your baggy

What does the cardboard represent? The bag?

Step 2: The StomachPushing food down the esophagus is called

peristalsis

Your stomach breaks down food by churning and using enzymes, stomach acid, and mucus. The new mixture is called chyme.

The gall bladder creates bile which breaks down fat

Add food coloring to the mixture to represent these 3 things!

Making poop…Push the mixture in the baggy to the

corner

Add green food coloring (Bile)

Your mixture is now called chyme

Cut a hole in the corner and pour into the hose (over the paper towels!)

Step 3: The Small IntestineYour food has now entered the

small intestine!

Nutrients are now taken through the villi

Blood vessels send it to the body

Making poop…Set the small intestine on a paper

towel

What does the paper towel do?

What does this represent?

Step 4: The Large IntestineHere, water is drained from the

excess waste

If there is not enough time for water to be absorbed-diarrhea

Too much water absorbed-constipation

And we have…POOP!!

Clean up proceduresIf you are person:

1- get a new cup2-get a new baggy3- get a new cardboard role4-pantyhose and place the tray

back on the counter

HomeostasisIn your notebook, write how the

digestive system maintains homeostasis.

Digestive System ReviewWhen a description appears,

decide as a group which vocabulary word goes with that definition and hold up your board.

The place digestion begins

Mouth

What is the enzyme in saliva that breaks down food?

Amylase

The part of the digestive track that moves food from the mouth to the stomach

Esophagus

Breaks down food by churning and using mucus, enzymes, and acid

Stomach

Creates bile and breaks down fat

Gall Bladder

Part of the digestive track where nutrients are absorbed and sent to the rest of the body

Small intestine

Organ that filters out harmful toxins

liver

Structures in the small intestine that absorb nutrients

Villi

Organ that releases a hormone to regulate the amount of sugar in the blood

Pancreas

Part of the digestive tracks that absorbs water from the excess waste

Large Intestine

Name of the mixture in your stomach once it is churned and acid, enzymes, and mucus, have been added.

Chyme