Question

name the tough outermost layer of the sac that surrounds the heart. endocardium visceral pericardium epicardium fibrous pericardium

Explanation:

The fibrous pericardium is the tough, outermost layer of the sac surrounding the heart. The endocardium lines the inner surface of the heart chambers. The visceral pericardium is the inner layer of the serous pericardium, also known as the epicardium, which is the outer layer of the heart wall.

Answer:

D. Fibrous pericardium