PSY 605 Lecture Notes - Lecture 6: Olive Oil, Arteriosclerosis, Veganism
30 May 2018
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• Cardiovascular Disease and Behavioural Cardiology
• A Primer on the Cardiovascular System & Cardiovascular Disease
Book chapter: systems of the body
• The Cardiovascular System
• In a nutshell it: Carries oxygen and nutrients to cells, and waste products from cells via the
blood
• Circulation occurs through pumping of the myocardium: myocardium is the heart
• Myocardium has its roots in Latin and Greek and the reason why they use complicated
terminology is because science originally came from Europe and people spoke different
languages so they used Latin and Greek because highly scholar people would know Latin
and they would sometimes use Greek roots as well so that people had a common
language
• Myocardium means heart muscle - myo which is muscle, cardium is the heart (Latin with
Greek roots)
• Force is now exerted upon artery walls by the blood - it has to get there somehow so the
heart pumps through all these tubes and different forces are exerted upon these very
flexible tubes and these tubes includes arteries, veins, capillaries, and especially the
arteries will get the most pressure because the heart is pumping and it pumps through the
arteries - they are the tubes that go from the heart to the various parts of the body - there
are also veins, they go from various parts of the body back to the heart and back to the
lungs
• The hearts job is to to pump blood through the body and so there are two different kinds
of pressures which are important when we think about heart functioning and heart
disease:
• There is systolic pressure which is the maximum force in the arteries caused by the
pumping of the heart
• There is also:
• Diastolic pressure which is the resting force in the arteries that occurs between
myocardial/ heart contractions - think of it this way: if you blow up a balloon there will be
a lot of force in the balloon as you blow the air into it and that's when it's most likely to
pop, if you over do it but then in between my breaths when I wont be pumping my air into
the balloon, there will be less pressure - so one of them is the higher/maximum pressure
that's the systolic pressure. In normal blood pressure, there's variability in how people see
it, but people do want to see that it's no more than 120 systolic over 80 diastolic
• Systolic vs. diastolic pressure
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