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Chapter 18: Cardiovascular System

Difficulty Level: At Grade Created by: CK-12
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Place two fingers of one hand on the inside of your other wrist, as shown in this photo. You should be able to feel your pulse. What you are actually feeling is the pressure of blood inside a blood vessel in your wrist. Each throb of your pulse represents a beat of your heart. Your heart, blood vessels, and blood are all part of your cardiovascular system.

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