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

5. Integumentary System

Introduction to the Integumentary System

Anatomy & Physiology

5. Integumentary System

Introduction to the Integumentary System

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Multiple Choice

Which layer of the skin forms a watertight barrier to protect the body from dehydration?

Hypodermis

Stratum basale

Dermis

Stratum corneum

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Verified step by step guidance

Understand the structure of the skin: The skin is composed of three main layers—epidermis, dermis, and hypodermis. The epidermis is the outermost layer, and it contains several sublayers, including the stratum corneum.

Learn the function of the stratum corneum: The stratum corneum is the outermost layer of the epidermis. It consists of dead keratinized cells that are tightly packed and surrounded by lipids, forming a watertight barrier.

Compare the roles of the other layers: The hypodermis primarily provides insulation and cushioning, the dermis contains connective tissue, blood vessels, and nerves, and the stratum basale (part of the epidermis) is responsible for cell division and regeneration.

Focus on the watertight barrier: The stratum corneum is specifically designed to prevent water loss and protect the body from dehydration, making it the correct answer.

Conclude the reasoning: Based on the structure and function of the skin layers, the stratum corneum is the layer that forms the watertight barrier to protect the body from dehydration.