What membrane lines body cavities and covers the organs found in those cavities?

A serous membrane lines the body cavities and also covers the organs inside the cavities. The upper cells produce the lubricating serous fluid. This fluid has a consistency similar to thin mucus. There is a connective tissue layer that provides the blood vessels and nerves for the overlying secretory cells, and also serves as the binding layer which allows the whole serous membrane to adhere to organs and other structures.