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No, the arterioles are very small vessels and lack this thick layer. Instead they consist only of an endothelial layer wrapped by a few smooth muscle fibres.

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The smooth muscle tissue layer of the arteries and veins?

the middle layer, called the tunica media


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What is the size of the arteriole?

what is the actual size of arteriole


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What type of vessels don't have an outer layer of elastic?

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