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Best Answer: Intercalated discs are areas where cardiac muscle cells (among a few other cell types) are joined together. These discs contain gap junctions, which are small pores that connect the cytoplasm of one cell to the next.
Muscular arteries distribute blood to the skeletal muscles and internal organs. The tunica media of the muscular arteries have a higher percentage of smooth muscles than connective tissue. Vasoconstriction and vasodilation of these vessels is controlled by the autonomic nervous system.ontraction of the smooth muscles of the media is called vasoconstriction and results in a decrease in the size of the lumen and a decrease in blood flow. Relaxation of the smooth muscles is vasodilation which has the opposite effects.