What is the function of this type of blood vessel? (lumen)
a.Carry blood away from the heart under high pressure.
b.Carry blood back to the heart under low pressure.
c.Carry blood back to the heart under high pressure.
d.Exchange of substance between blood and tissues.
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may I think the aswer is d.. the function of human blood vessel is to exchange the substance between blood and tissues
please make me as brainlist
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