Which of the following statements about larger lymphatics is incorrect?
A. They have valves.
B. They have thicker walls than veins.
C. The tunica media has smooth muscle and elastic fibers.
D. The endothelium of the tunica interna is similar to that of veins.
E. The tunica externa is relatively thin.
Answer: B
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Fill in the blank(s) with the appropriate word(s).
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