BIO-0014 Lecture Notes - Lecture 23: Sinoatrial Node, Inferior Vena Cava, Mediastinum

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1. Cardiovascular introduction
i. Potential energy is the main type of energy in pushing blood around the
ii. In order to overcome frictional resistance, potential energy is used up
iii. Therefore the heart must be energized continuously
1. If blood stops bleeding no blood flow, death with follow
i. Allows us to divert the blood where we may not need as much to areas
we need it more
ii. Happens during exercise
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