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

What is the primary function of the folds and villi in the small intestine?

To secrete digestive enzymes

To transport waste materials to the large intestine

To protect the intestinal lining from pathogens

To increase the surface area for nutrient absorption

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Verified step by step guidance

Understand the structure of the small intestine: The small intestine is a long, coiled organ where most of the digestion and absorption of nutrients occurs.

Identify the features of the small intestine: The inner surface of the small intestine is lined with folds, villi, and microvilli, which are small, finger-like projections.

Recognize the role of folds and villi: These structures significantly increase the surface area of the intestinal lining, allowing for more efficient absorption of nutrients.

Consider the function of increased surface area: By having a larger surface area, the small intestine can absorb more nutrients from the digested food as it passes through.

Conclude the primary function: The primary function of the folds and villi in the small intestine is to increase the surface area for nutrient absorption, enhancing the efficiency of the digestive process.