Table of contents

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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

How do the nutrients from food reach the body's cells after digestion?

They are directly absorbed into the cells from the stomach.

They are absorbed into the bloodstream through the walls of the large intestine.

They are transported by the lymphatic system directly to the cells.

They are absorbed into the bloodstream through the walls of the small intestine.

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Verified step by step guidance

Begin by understanding the process of digestion, where food is broken down into smaller components in the stomach and intestines.

Recognize that the small intestine is the primary site for nutrient absorption. Its walls are lined with villi and microvilli, which increase the surface area for absorption.

Learn that nutrients such as carbohydrates, proteins, and fats are absorbed through the epithelial cells of the villi into the bloodstream.

Understand that once in the bloodstream, these nutrients are transported to various cells throughout the body to be used for energy, growth, and repair.

Note that the lymphatic system also plays a role in transporting certain nutrients, like fats, but the primary pathway for most nutrients is through the bloodstream from the small intestine.