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Chapter 8: Problem 33

Match each statement to a layer of the wall of the esophagus in the key. Answers may be used more than once. a. mucosa b. submucosa c. muscularis d. serosa 3\. Contains digestive glands and mucus-secreting goblet cells

Short Answer

Expert verified
The answer is 3. b) Submucosa, as this layer contains digestive glands and mucus-secreting goblet cells.

Step by step solution

01

Identify the layers of the esophagus wall and their functions

The esophagus wall has four main layers: a) Mucosa: This is the innermost layer, made up of epithelium, lamina propria, and muscularis mucosae. It secretes mucus and aids in the passage of food. b) Submucosa: This layer contains blood vessels, nerves, and glands. Glands in the submucosa secrete mucus to lubricate the esophagus. c) Muscularis: Made up of smooth muscle, this layer is responsible for peristalsis and moving food down the esophagus. d) Serosa: This is the outermost layer, made up of connective tissue. It anchors the esophagus to other structures in the body.
02

Analyze the statement

The statement mentions "digestive glands" and "mucus-secreting goblet cells." Goblet cells are specialized epithelial cells that secrete mucus, and they can be found in both the mucosa and submucosa layers. Digestive glands are also found in the submucosa layer, where they secrete mucus to lubricate the esophagus.
03

Match the statement to the correct layer

Given that digestive glands and mucus-secreting goblet cells are mainly found in the submucosa layer, the statement can be matched to this layer. The answer is: 3. b) Submucosa

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