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

Fat-soluble nutrients are absorbed into _____ within each villus.

goblet cells

crypts of Lieberkühn

lacteals

capillaries

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Verified step by step guidance

Step 1: Begin by understanding the structure of a villus, which is a small finger-like projection in the lining of the small intestine. Each villus contains blood capillaries and a lymphatic vessel called a lacteal.

Step 2: Recall that fat-soluble nutrients, such as vitamins A, D, E, and K, are absorbed differently than water-soluble nutrients. Fat-soluble nutrients are packaged into chylomicrons (lipoprotein particles) after being processed in the intestinal cells.

Step 3: Understand the role of lacteals in the absorption process. Lacteals are specialized lymphatic vessels within the villi that absorb chylomicrons because they are too large to enter the blood capillaries directly.

Step 4: Compare the options provided: Goblet cells are responsible for mucus secretion, crypts of Lieberkühn are involved in cell renewal and secretion, and capillaries absorb water-soluble nutrients. Lacteals are the correct structure for absorbing fat-soluble nutrients.

Step 5: Conclude that fat-soluble nutrients are absorbed into lacteals within each villus, as they are specifically designed to transport lipids and chylomicrons into the lymphatic system.