_____ is a potent vasodilator.

Histamine makes blood vessels wider and guarantees that arteries and veins are operating properly. A vasodilator includes relaxing the smooth muscles close to the blood vessels; histamine attaches to the walls of the blood vessels and aids in increasing blood flow. The smooth inner walls of arteries control how much blood flows through the body. Occasionally, these arteries may acquire a blockage, which lowers blood flow by contracting the artery walls. Vasodilators are therefore needed to remove the blockage. A powerful vasodilator opens up blood channels and relaxes artery walls. As a result, vasodilators lower high blood pressure and return it to a normal range.