Capillary
Beds Throughout the Body
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The blue blood vessels
are veins or venules and the red vessels are arteries or
arterioles.
Venules are branches of veins and blood moves from venule to
veins.
Arteries branch into arterioles which branch into capillary beds.
Capillaries then fuse back into venules. In all but one case,
blood
travels from a capillary bed to a venule, to a vein and then to the
heart
and lungs before it returns to the capillary via arteries and
arterioles.
The exception is the blood that moves out of the gastrointestinal tract
which moves to the liver through the hepatic-portal vein. The
liver
functions as a detoxifying organ to monitor blood filled with molecules
found in food or drink. From the liver the blood circulates in the
normal
fashion.
Source: Compton's
Online Encyclopedia
To view the
pulmonary circulation
closer: PULMONARY
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