3)muscularis externa ● smooth muscle ● skeletal muscle inner circular and outer longitudinal XNerve plexus: regulate the movement of 4)adventitia: CT serosa CT+ mesothelium ● fibrosa:LcT3) muscularis externa smooth muscle skeletal muscle inner circular and outer longitudinal *Nerve plexus: regulate the movement of M 4) adventitia: CT serosa: CT + mesothelium fibrosa: LCT