What layer of an artery provides a smooth surface for blood cells to flow through and helps prevent blood clotting?Multiple choice question.endotheliumtunica mediatunica externatunica adventitia

Which layer of a blood vessel wall is the thickest and contains smooth muscle?Multiple choice question.tunica mediatunica externatunica interna

What is the outermost layer of an artery's wall called?Multiple choice question.tunica externatunica mediatunica internaendothelium

Select all that applyWhat are functions of the endothelium lining a blood vessel?Multiple select question.provides blood vessel elasticitysecretes substances that stimulate vessel dilation or constrictionprevents inappropriate blood clottingconstricts or dilates to control blood flowprovides a smooth surface for blood flow

Which layer of an artery is the thickest?Group of answer choices

The tunica media is the ______ layer in a blood vessel wall.Multiple choice question.outerinnermiddle