NUTRITION
DIGESTIVE SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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stomach wall.
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stomach lining.
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intestinal lining.
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esophagus.
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Detailed explanation-1: -Mucosa. This is the first and innermost layer or lining. It contains the glands that release digestive juices. These are called hydrochloric acid and pepsin.
Detailed explanation-2: -The surface of the stomach and opening of the gastric pits have a single layer of columnar epithelial cells, known as surface mucous cells or foveolar cells. These cells secrete a thick layer of mucus that covers the stomach lining and protects it from the digestive juices.
Detailed explanation-3: -The mucosa, or mucous membrane layer, is the innermost tunic of the wall. It lines the lumen of the digestive tract. The mucosa consists of epithelium, an underlying loose connective tissue layer called lamina propria, and a thin layer of smooth muscle called the muscularis mucosa.