Peritoneum serosa with

Figure 3.14. Structure of the stomach. Stomach contains four layers, including the mucosa, submucosa, muscularis, and serosa. The inner infolded mucous layer is made up of columnar epithelium, and gastric pits are found within the infoldings. Submucosa contains connective tissue and vessels, and the muscularis contains muscle fibers. The serosa is on the outside of the stomach and is continuous with the peritoneum.

The next layer is the muscularis externa, which contains circular muscle fibers on the top layers and longitudinal muscle fibers on the outer layers. Finally, the serosa is found which is continuous with the peritoneum. Food movement through the stomach into the intestines occurs by contraction of the muscle fibers in the musclularis. 

Figure 3.16. Structure of bladder. This structure is composed of mucosa, muscularis, and serosa. In the bladder, the mucosa is infolded when empty and is supported by connective tissue in the lamina propria. Muscularis contains smooth muscle bundles, and the serosa is continuous with the peritoneum.

Fig. 37.16 Large metastasis in the right hepatic lobe with distinct cancer umbilicus subsequent to breast cancer (serosa, peritoneum and ligaments without pathological findings)...

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