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Learning anatomy/Vein
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Vein
Capillary Venule
Anatomy
Just like the other blood vessels, the parts of the vein are the intima, media, and adventitia.
Circulatory System en
Function
Oxygen has been used so it travels back to the heart through the veins.