MICROANATOMY

Detailed explanation-1: -Mesothelium lines your major body cavities, such as the peritoneum (abdomen cavity), pleura (lung cavity) and pericardium (heart cavity). Mesothelium secretes a lubricant film called serous fluid. Epithelial tissue plays many vital roles in your bodily functions and health.

Detailed explanation-2: -The mesothelium that secretes serous fluid as a main function is also known as a serosa.

Detailed explanation-3: -The epicardium refers to the outermost protective layer of the heart. The epicardium is composed of mesothelium, a cell type that covers and protects most of the internal organs of the body as well as fat and connective tissue.

Detailed explanation-4: -The epicardium is a mesothelium forming the outermost layer of the heart.