Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart3h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

23. The Digestive System

Introduction to the Digestive System

Anatomy & Physiology

23. The Digestive System

Introduction to the Digestive System

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Multiple Choice

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?

Submucosa, mucosa, serosa, muscularis externa; crypts of Lieberkühn

Muscularis externa, mucosa, submucosa, serosa; Peyer's patches

Mucosa, submucosa, muscularis externa, serosa; gastric pits

Serosa, muscularis externa, submucosa, mucosa; villi

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Verified step by step guidance

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.

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.

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.

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.

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.