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 media and tunica externa are thin (d) tunica media is a thin coat.

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 media and tunica externa
are thin
(d) tunica media is a thin coat.
by

1 Answer

Answer :

(d) tunica media is a thin coat.
by

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