Which of the following correctly lists the layers of the gastric wall from innermost to outermost, along with a structure found in the lining of the stomach?

• A. Submucosa, mucosa, serosa, muscularis externa; crypts of Lieberkühn
• B. Muscularis externa, mucosa, submucosa, serosa; Peyer's patches
• C. Mucosa, submucosa, muscularis externa, serosa; gastric pits
• D. Serosa, muscularis externa, submucosa, mucosa; villi

Answer: (C)

Verified step by step guidance

1. Step 1: Understand the structure of the gastric wall. The stomach wall is composed of four layers arranged from innermost to outermost: mucosa, submucosa, muscularis externa, and serosa.
2. Step 2: Learn the function of each layer. The mucosa is the innermost layer and contains specialized structures like gastric pits, which secrete gastric juices. The submucosa provides support and contains blood vessels and nerves. The muscularis externa is responsible for the movement of the stomach, and the serosa is the outermost protective layer.
3. Step 3: Compare the options provided in the question. Identify which option correctly lists the layers in the proper order (mucosa, submucosa, muscularis externa, serosa) and includes a structure found in the stomach lining, such as gastric pits.
4. Step 4: Eliminate incorrect options based on anatomical knowledge. For example, crypts of Lieberkühn are found in the intestines, not the stomach, and Peyer's patches are lymphatic structures in the small intestine. Villi are also found in the intestines, not the stomach.
5. Step 5: Confirm the correct answer. The correct sequence of layers is mucosa, submucosa, muscularis externa, serosa, and the structure found in the stomach lining is gastric pits.