Eli5: why does it hurt so much more to draw blood from an artery as opposed to a vein?

Question

Eli5: why does it hurt so much more to draw blood from an artery as opposed to a vein?

In: Biology

Answer 1

Arteries have thick muscular walls with nerve fibers interlaced among the smooth musclefibers, whereas venous walls are thin and relatively weak, so there is less resistance to a needle passing through.