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 jejunum in the digestive system?

Absorption of nutrients

Mechanical breakdown of food

Storage of bile

Production of digestive enzymes

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Verified step by step guidance

Step 1: Begin by identifying the jejunum as part of the small intestine, located between the duodenum and ileum. Its structure is specialized for its function in the digestive system.

Step 2: Understand the primary role of the small intestine, which is nutrient absorption. The jejunum, specifically, has a highly folded lining with villi and microvilli that increase surface area for absorption.

Step 3: Eliminate incorrect options by considering the anatomy and physiology of the digestive system. For example, 'Mechanical breakdown of food' primarily occurs in the mouth and stomach, not the jejunum.

Step 4: Similarly, 'Storage of bile' is a function of the gallbladder, and 'Production of digestive enzymes' is primarily associated with the pancreas and stomach, not the jejunum.

Step 5: Conclude that the primary function of the jejunum is the absorption of nutrients, as its structure and location are optimized for this purpose in the digestive process.