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 describes a structural difference between the small intestine and the colon?

The small intestine has villi, while the colon does not.

The small intestine lacks mucosal folds, while the colon has them.

The colon has a longer length than the small intestine.

The colon contains more digestive enzymes than the small intestine.

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Verified step by step guidance

Step 1: Begin by understanding the structural and functional differences between the small intestine and the colon. The small intestine is primarily responsible for nutrient absorption, while the colon focuses on water absorption and waste processing.

Step 2: Recall that the small intestine has specialized structures called villi and microvilli, which increase the surface area for nutrient absorption. The colon lacks these structures because its primary function is not nutrient absorption.

Step 3: Consider the presence of mucosal folds. The small intestine has circular folds (plicae circulares) to further increase surface area for absorption, while the colon does not have these folds.

Step 4: Compare the lengths of the small intestine and the colon. The small intestine is significantly longer (approximately 6 meters) compared to the colon (approximately 1.5 meters).

Step 5: Evaluate the presence of digestive enzymes. The small intestine produces enzymes like maltase, sucrase, and lactase for digestion, while the colon does not produce digestive enzymes but relies on bacterial fermentation for processing undigested food.