Blood vessel
From Wikipedia, the free encyclopedia.

The blood vessels are used to transport blood throughout the human body. The major types of blood vessels are:

• arteries: smaller arteries are called arterioles
• capillaries
• veins: smaller veins are called venules

''see also anatomy, human anatomy, cardiovascular system

The original article can be found at: http://en.wikipedia.org/wiki/Blood_vessel.
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