Choose the following statement that is NOT completely correct regarding serous membranes. Visceral pericardium covers the outer surface of the heart, and parietal pericardium lines the internal walls of the heart. Serous membranes secrete a watery lubricating fluid. Serosa are very thin, double-layered structures. Serous membranes are divided into parietal and visceral membranes with a virtual space between the two.

Visceral pericardium covers the outer surface of the heart, and parietal pericardium lines the internal walls of the heart.

Explanation:

Serous membrane, is a moist membrane formed by a thin layer of epithelial cells, supported on a thin connective tissue, responsible for lining the body cavities. The layer lining the cavity wall is known as the parietal layer, while the layer responsible for lining the outer surface of the organs is known as the visceral. For this reason, we can conclude that among the options given, the statement that is not completely correct is "The visceral pericardium covers the outer surface of the heart and the parietal pericardium covers the inner walls of the heart."