A vein possesses a large lumen because

A Tunica Media And Tunica Externa Form A Single Coat

B Tunica Interna And Tunica Media Form A Single Coat

C Tunica Interna, Tunica Nicuiu And Tunica Externa Are Thin

D Tunica Media Is A Thin Coat

Answer & Explanation
Answer: Tunica Media Is A Thin Coat

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