a: healthy artery ~
b: a rubber tube
What:
"A healthy artery is like a rubber tube. It is smooth and flexible, and blood flows through it freely. If your heart has to work harder, such as when you exercise, a healthy artery can stretch to let more blood flow to your body's tissues."
Useful?
Writer: Not Stated
LCC:
Where:
Date: Dec 15 2015 4:13 PM
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