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OpenStudy (anonymous):
A blood vessel with a thick layer of smooth muscle and elastic fibers is A. a vein. B. an artery. C. a capillary. D. the vena cava.
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OpenStudy (jahnavi):
I feel its D.the vene cava
OpenStudy (jahnavi):
It is so because vene cava has to receive impure blood from the entire body.Hence the pressure it has to bear is more.
OpenStudy (anonymous):
Thank you. :)
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