The innermost layer of an artery or vein is called the
A) tunica intima
B) tunica media
C) endothelium
D) both a and c above

Question

Quizplus · Accepted Answer

The innermost layer of an artery or vein is called the tunica intima, which consists of the endothelium (a single layer of cells that lines the interior of the blood vessels) and a thin layer of connective tissue. Therefore, both choice A (tunica intima) and choice C (endothelium) are correct.

The Innermost Layer of an Artery or Vein Is Called