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

At which location do the digestive and circulatory systems primarily interact to allow nutrient absorption into the bloodstream?

In the stomach, where blood absorbs digested proteins

In the large intestine, where oxygen is exchanged with blood

In the small intestine, where nutrients are absorbed into capillaries

In the esophagus, where nutrients enter the bloodstream directly

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Verified step by step guidance

Understand the primary function of the digestive system: it breaks down food into smaller molecules that can be absorbed into the bloodstream for distribution to the body's cells.

Recognize the role of the circulatory system: it transports nutrients, oxygen, and waste products throughout the body via blood vessels.

Identify the small intestine as the key site of nutrient absorption. The small intestine contains structures called villi and microvilli, which increase surface area for absorption and contain capillaries where nutrients enter the bloodstream.

Clarify that the stomach primarily functions in mechanical and chemical digestion, not absorption into the bloodstream. Proteins are broken down here, but absorption occurs later in the small intestine.

Eliminate incorrect options: The large intestine is involved in water absorption and waste processing, not nutrient absorption. The esophagus is a passageway for food and does not facilitate nutrient absorption into the bloodstream.