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Heart and Circulatory Free E-Mail
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Heart and Circulatory
The Blood Vessels

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The Blood Vessels

Introduction to the Vascular System
The circulatory network that nourishes your body.
Arteries
Arteries expand to increase blood flow when the heart is working hard.
Veins
Veins bring blood back to the heart.
Capillaries
These tiny vessels supply oxygen and nutrients to tissues.
Blood
The average adult has about 10 pints of blood.
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Chrome 2001
Chrome 2001