Which Blood Vessels Lack Elastic Tissue

Which Blood Vessels Lack Elastic Tissue. Which blood vessels lack or have the least amount of elastic tissue? Aside from capillaries, blood vessels are all made of three layers:

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Venous valves typically consist of two elastic flaps of tissue that open and close in alternation. The tunica external of the aorta is nearly absent compared to other vessels. Group of answer choices muscular arteries and arterioles venules and veins arterioles and capillaries capillaries and venules an increase.

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