lp-blood-flow-instructional-slide-show final 170731 · 2017-11-28 ·...
TRANSCRIPT
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Healthy artery
Plaque
buildup
Narrowedartery
Big diameter Small diameter
Coronary heart disease:Atherosclerosis
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Materials you need
Students
• Modeling clay• Stopwatch• Two cups (16 oz.)• Aluminum tray• Two straws (different diameter)
Teacher
• Scissors• Water• Red food coloring• Measuring cup• Permanent marker
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Blood flow model
Artery = Straw
Blood = (Red) water
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Put the straws into the cup
smaller hole=
narrow straw
bigger hole=
wide straw
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Seal the hole around the straw with modeling clay
Inside
Outside
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Place the cup inside the aluminum tray
Plug the straw with a piece of modeling clay
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Let your teacher fill the cup
Teacher will provide water
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Get your stopwatch ready
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Remove the plug and start stopwatch
Remove the plug
Start stopwatch
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Stop stopwatch when flow stops
Stop stopwatchand
record time
Flow stopped
Remaining water
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Repeat the experiment with the second straw
Second straw
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Analyze your data & Make a graphMeasured time narrow straw
Measured time wide straw
_________ seconds _________ seconds
Narrow&Straw(smaller&diameter)
Wide&Straw(larger&diameter)
Measured&tim
e&[secon
ds],&or
calculated
&flow
&rate&[m
L/s]