Download Preparing to Use the Circulatory System Model

Preparing to Use the
Circulatory System Model
•Assembly
•Mixing of Solutions
•Manipulation
Assembly
1. Assemble the parts of the model as shown.
2. The “lungs” goes to the rear right square hole.
3.The “body” goes to the rear left square hole.
4. Put the “right” and “left ventricles”w/ “atria”
in the rectangular hole in front of the “body”
and the “lungs.”
*As you face the model, the right ventricle and atrium will be on the left while the left ventricle
and atrium will be on the right---just as they would be in a person facing you.
5. Then, connect the “blood tubes” as shown.
The green or blue rubber stopper-syringe and
tube covers the “right ventricle” with the other
end of the “artery”
going into the “lungs.”
The “vein” leaving the
“lungs,” color-coded
red, is connected to
the left atrium.
6. Do the same with
the red color-coded
rubber stoppersyringe. It should
cover the “left
ventricle” with the
“artery” going into
the “body,” and the
“vein” going into the
“right atrium.
7. When completely assembled, the circulatory
system model should look like this:
*You are now ready to mix the solutions that will represent “blood rich in oxygen” and
“blood poor in oxygen.”
Mixing of Solutions
1. In a clear glass jar, dissolve half of 1/8
teaspoon of phenolphthalein powder in 70%
ethyl alcohol. Set aside.
2. In another clear glass jar, dissolve 1/8
teaspoon apog in water until the mixture is
clear.
3. Using a funnel, pour
both mixtures into a
1.5 L clear plastic
bottle.
The resulting liquid
suddenly turns dark
pink or red.
4. Add water up to the neck.
This will be the “oxygen-rich
blood.” You may now pour this
into the “lungs,” “left
ventricle,” and “left atrium” of
the model.
5. Fill the “body,” “right ventricle,” and “right
atrium” with water.
•
Manipulation
1. Make sure all stoppers and covers are firmly in
place. The circulatory system model is now
ready for use.
2. Press the “right” and “left ventricles”
rhythmically with your thumbs while your other
fingers hold the bottles. Watch the solutions fill
the tubes.
*Add vinegar to the “body” when it starts to turn pink.