GENERAL HISTOLOGY

Detailed explanation-1: -The extrinsic autonomic system innervates the heart via the vagosympathetic trunk. Innervation from the intrinsic autonomic system is via the ganglionated plexi and interganglionic axons distributed in the cardiac epicardial fat pads found predominantly at the PV antrum and superior vena cava junction.

Detailed explanation-2: -Smooth muscle, found in the walls of the hollow internal organs such as blood vessels, the gastrointestinal tract, bladder, and uterus, is under control of the autonomic nervous system.