arterial vasoconstriction and vasodilation. comparison of normal, constricted, and dilated blood vessels. .

vasoconstriction vasodilatation diagram organ presentation red orange design arterial vasodilation arteries comparison normal constricted dilated blood vessels vector artery vein vessel aorta pressure cardiovascular health medical medicine science healthy body disease biology anatomy muscle system tunica human cell anatomical flow fibers circulation circulatory nervous elastic capillaries care thickness diameter cross autonomic control vasodilation vessels