ANATOMY

Detailed explanation-1: -Your pericardium is a protective, fluid-filled sac that surrounds your heart and helps it function properly. Your pericardium also covers the roots of your major blood vessels as they extend from your heart. These are known as your “great vessels, ” and they include your: Aorta.

Detailed explanation-2: -The part of the visceral layer that covers the heart, but not the great vessels is called the epicardium. As the serous pericardium reflects off various cardiac structures, it forms two sinuses: the transverse sinus and the oblique sinus.

Detailed explanation-3: -Pericardium (the protective membrane surrounding the heart).

Detailed explanation-4: -A fibrous sac called the pericardium surrounds the heart. This sac has two thin layers with fluid between them. This fluid reduces friction as the two layers rub against each other when the heart beats.

Detailed explanation-5: -The pericardium is the membrane that encloses the heart and the roots of the major heart vessels, consisting of an outer fibrous layer (fibrous pericardium) and an inner double serous membrane layer (serous pericardium).