Question

multiple choice question what layer of an artery provides a smooth surface for blood cells to flow through and helps to prevent blood clotting? the tunica externa the tunica adventitia the endothelium the tunica media

Explanation:

The endothelium is the innermost layer of arteries. It provides a smooth surface for blood - cell flow and has anti - clotting properties. The tunica externa and tunica adventitia (same structure) are outer layers mainly for protection and anchoring. The tunica media is the middle layer with smooth muscle and elastic fibers for vessel constriction and dilation.

Answer:

The endothelium