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 is the name for the slippery outer layer of the alimentary canal?

Mucosa

Submucosa

Serosa

Muscularis externa

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Verified step by step guidance

Understand the structure of the alimentary canal: The alimentary canal is composed of several layers, each with specific functions. These layers include the mucosa, submucosa, muscularis externa, and serosa.

Define the mucosa: The mucosa is the innermost layer of the alimentary canal. It is responsible for secretion, absorption, and protection. It is not the slippery outer layer.

Define the submucosa: The submucosa lies beneath the mucosa and contains connective tissue, blood vessels, and nerves. It provides support and elasticity but is not the outermost layer.

Define the muscularis externa: The muscularis externa is a layer of smooth muscle responsible for peristalsis and segmentation. It is located beneath the serosa and is not the outermost layer.

Define the serosa: The serosa is the slippery outer layer of the alimentary canal. It is composed of a thin layer of connective tissue covered by a layer of epithelial cells, which secrete a lubricating fluid to reduce friction between organs.