Preparing to Use the Circulatory System Model Assembly Mixing of Solutions Manipulation.
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Transcript of Preparing to Use the Circulatory System Model Assembly Mixing of Solutions Manipulation.
![Page 1: Preparing to Use the Circulatory System Model Assembly Mixing of Solutions Manipulation.](https://reader035.fdocuments.us/reader035/viewer/2022062517/56649f225503460f94c3a4b8/html5/thumbnails/1.jpg)
Preparing to Use the Circulatory System Model
•Assembly•Mixing of Solutions
•Manipulation
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Assembly1. Assemble the parts of the model as shown.
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2. The “lungs” goes to the rear right square hole.
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3.The “body” goes to the rear left square hole.
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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.
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end of the “artery” going into the “lungs.” The “vein” leaving the “lungs,” color-coded red, is connected tothe left atrium.
5. Then, connect the “blood tubes” as shown. The green or blue rubber stopper-syringe and tube covers the “right ventricle” with the other
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6. Do the same with the red color-coded rubber stopper-syringe. It should cover the “left ventricle” with the “artery” going into the “body,” and the “vein” going into the “right atrium.
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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.”
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Mixing of Solutions1. In a clear glass jar, dissolve half of 1/8
teaspoon of phenolphthalein powder in 70% ethyl alcohol. Set aside.
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2. In another clear glass jar, dissolve 1/8 teaspoon apog in water until the mixture is clear.
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3. Using a funnel, pour both mixtures into a 1.5 L clear plastic bottle.
The resulting liquid suddenly turns dark pink or red.
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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.
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5. Fill the “body,” “right ventricle,” and “right atrium” with water.
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1. Make sure all stoppers and covers are firmly in place. The circulatory system model is now ready for use.
Manipulation
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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.