Final answer:
The pericardium is the anatomical structure that separates the superficial and deep cardiac plexuses, encompassing the heart and consisting of two sublayers.
Step-by-step explanation:
The anatomical structure that separates the superficial and deep cardiac plexuses is the pericardium. The pericardium is a membrane that encases the heart and separates it from other mediastinal structures. It consists of two fused sublayers: the fibrous pericardium and the parietal pericardium. Considering the three layers of the wall of the heart from superficial to deep, they are the epicardium, the myocardium, and the endocardium. The myocardium is the thick muscle layer responsible for the beating of the heart and is surrounded by the pericardium.
The innermost layer of the pericardium is the epicardium, which is in direct contact with the myocardium.The anatomical structure that separates the superficial and deep cardiac plexuses is the endocardium. The endocardium is the innermost layer of the heart wall and it lines the chambers of the heart, allowing for smooth blood flow. It is made up of specialized cardiac muscle cells and connective tissue.