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Blood Pressure in Arteries - Pascal's Law Example

Discussion in 'MCAT Study Question Q&A' started by manohman, Sep 29, 2014.

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  1. manohman

    manohman 2+ Year Member

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    So by Pascal's law we know that pressure exerted on a liquid is confined area (i.e. an artery) is applied equally in all directions throughout the liquid (assuming radius resistance etc stays the same).

    So it goes to show that the pressure against the walls of the arteries is the same as the pressure exerted on the blood by the heart, and this is how we measure blood pressure using a cuff (eurkea! i just got that! haha).

    But by Pascal's Law, the pressure going through the blood, not against the walls, but moving forward in the direction of blood flow, should be the same as that against the arteries and applied by the heart as well ,then right?

    Lot of questions keep popping into the head just want to make sure haha
     
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  3. justadream

    justadream 5+ Year Member

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    Not really sure if I understand your question.

    The pressure moving the blood does change (in fact it drops as you move away from the heart).
     
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