Which part(s) of the cardiovascular system has/have a single layer of endothe- lial cells as the innermost layer of the structure(s)? A. arteries, capillaries and veins B. arteries and veins C. heart, arteries, veins and capillaries D. capillaries
Option C. Hear , arteries , vein and capillaries are the part of cardiovascular system which have single layer of endothelium as the innermost layer.
