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

The teeth and tongue contribute to which function of the digestive system?

Secretion

Chemical digestion

Absorption

Mechanical digestion

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Verified step by step guidance

Begin by understanding the role of the teeth and tongue in the digestive system. The teeth are responsible for breaking down food into smaller pieces through the process of chewing, which is a physical action.

Recognize that the tongue assists in manipulating food within the mouth, helping to mix it with saliva and form a bolus, which is easier to swallow.

Identify the term 'mechanical digestion,' which refers to the physical breakdown of food into smaller pieces without altering its chemical structure. This is distinct from 'chemical digestion,' where enzymes break down food molecules into their chemical components.

Consider the other functions listed: 'secretion' involves the release of substances like enzymes and hormones, 'chemical digestion' involves enzymatic breakdown, and 'absorption' is the uptake of nutrients into the bloodstream. None of these directly involve the physical actions of the teeth and tongue.

Conclude that the teeth and tongue primarily contribute to mechanical digestion, as they physically break down food and prepare it for further digestion in the stomach and intestines.