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Pressure and Blood Flow in the Cardiovascular System

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jaime cortes

on 9 June 2014

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Transcript of Pressure and Blood Flow in the Cardiovascular System

Hemodynamics and Pressure
Peripheral Resistance
Blood Flow Rate and Resistance
Turbulent and Laminar Flow
Distribution of Pressures and Volumes
Systematic Circulation
Pressure and Blood Flow
Arterial Blood Pressure
Cardiovascular Diseases
Pressure and Blood Flow in the Cardiovascular System

With the pressure kept constant at 28 mmHg, we found that...
As the diameter of the artery gets smaller, the pressure exerted by the heart will increase because the flow rate will be slower due to the resistance created by the length of the diameter.
Bernoulli's Equation
Bernoulli's Principle
Poiseulle's Law
Works cited

Chapter 12 Hemodynamics: Physical Principles. (n.d.). 1st ed. [ebook] Available at: http://prosono.ieasysite.com/12_hemodynamics_physical_principles_mar_2009.pdf [Accessed 19 May. 2014].

"High Blood Pressure (hypertension)." Definition. Mayo Foundation for Medical Education and Research, 28 Apr. 2014. Web. 01 June 2014.

Klablunde, Richard. "Bernoulli's Principle and Energetics of Flowing Blood." <i>CV Physiology:</i>. N.p., 1 June 2011. Web. 19 May 2014. &lt;http://www.cvphysiology.com/Hemodynamics/H012.htm&gt;.

Klablunde, Richard. "Determinants of Resistance to Flow (Poiseuille's Equation)." <i>CV Physiology:</i>. N.p., 8 Jan. 2008. Web. 19 May 2014. &lt;http://www.cvphysiology.com/Hemodynamics/H003.htm&gt;.

Klabunde, Richard E.. "Hemodynamics (Pressure, Flow, and Resistance)." . N.p., 12 Apr. 2007. Web. 2 June 2014. <http://www.cvphysiology.com/Hemodynamics/H001.htm>.

Klabunde, Richard E.. "Resistance to Blood Flow." . N.p., 9 Apr. 2007. Web. 2 June 2014. <http://www.cvphysiology.com/Hemodynamics/H002.htm>.

Klabunde, Richard E.. "Laminar Flow." . N.p., 1 June 2011. Web. 2 June 2014. <http://www.cvphysiology.com/Hemodynamics/H006.htm>.

"Pressure and Blood Flow." . N.p., 1 Jan. 1999. Web. 2 June 2014. <http://math.arizona.edu/~maw1999/blood/pressure.html>.

"What Is Cardiovascular Disease (Heart Disease)?" What Is Cardiovascular Disease (Heart Disease)? American Heart Association, Inc, 30 Aug. 2013. Web. 01 June 2014.

"What Is Atherosclerosis?" - NHLBI, NIH. National Institutes of Health, 1 July 2011. Web. 02 June 2014.

Figure #1: Rate of displacement with changing pipette diameters
The wider the diameter, the rate of displacement increases.
Pressure probe
Pipette tube
Two plastic tubes
100 mL Graduated cylinder
Pressure pump
Giant tub
1. Set up probes and use connectors to connect the two tubes to the probe.

2. Attach the tube to the pressure pump and measure the pressure exerted for about four minutes.

3. Then attach the pipette tube using the connector to the plastic tube. Fill the tub with water.

4. Take the graduated cylinder and fill it up with 75 mL of water. Insert the tube inside.

5. Turn the graduated cylinder upside down and place it underwater in the tub.

6. Plug in the pressure pump. Record the time it takes for the water to be displaced.

7. Cut the tip and repeat steps 4 - 6 for the remaining diameters. Don't forget to measure the each of the diameters of the pipette.
Focus Question
How does changing the diameter of the blood vessels affect circulation in the body?
Table #1: Increasing rate of displacement and time with change in pipette diameter
With the increasing diameter by multiples of .02, the amount of time it takes to displace 75mL of water decreases
Independent Variable
Dependent Variables
Pipette diameter
Noemi Cortes
Ruth Cortes
Kassandra Flores
Dominique Sarmiento
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