Innervation of blood vess Vasomotor center Sympathetic Blood vasoconstrictor fiber Distribution Almost all segments of the circulation The innervation is powerful in the kidneys essel gut, spleen and skin, is less potent in both skeletal and cardiac muscle and in the brainInnervation of blood vessels ➢ Sympathetic vasoconstrictor fiber ➢ Distribution: Almost all segments of the circulation. ➢ The innervation is powerful in the kidneys, gut, spleen and skin, ➢ is less potent in both skeletal and cardiac muscle and in the brain