THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -Above the diaphragm, the outermost layer of the digestive tract is a connective tissue called adventitia. Below the diaphragm, it is called serosa.

Detailed explanation-2: -Most part of the intestine is lined on its outer surface by a sheath of protective layer, the serosa, which consists of a continuous sheet of squamous epithelial cells, the mesothelium, separated from the underlying longitudinal muscle layer by a thin layer of loose connective tissue (Figure 1).

Detailed explanation-3: -Serous membranes have two layers. The parietal layers of the membranes line the walls of the body cavity (pariet-refers to a cavity wall). The visceral layer of the membrane covers the organs (the viscera). Between the parietal and visceral layers is a very thin, fluid-filled serous space, or cavity.