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

The Epidermis: Layers

Anatomy & Physiology

5. Integumentary System

The Epidermis: Layers

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Multiple Choice

In which of the following layers of the epidermis are dead, keratinized cells primarily found?

Stratum basale

Stratum spinosum

Stratum granulosum

Stratum corneum

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Verified step by step guidance

Understand the structure of the epidermis, which consists of five layers: stratum basale, stratum spinosum, stratum granulosum, stratum lucidum (only in thick skin), and stratum corneum.

Learn the function of each layer. The stratum basale is the deepest layer where cell division occurs. The stratum spinosum provides strength and flexibility. The stratum granulosum is where keratinization begins. The stratum corneum is the outermost layer composed of dead, keratinized cells.

Focus on the process of keratinization. Keratinocytes move upward through the layers, becoming more keratinized and eventually dying as they reach the stratum corneum.

Recognize that the stratum corneum is the layer responsible for providing a protective barrier. It consists of flattened, dead keratinized cells that are continuously shed and replaced.

Conclude that dead, keratinized cells are primarily found in the stratum corneum, as this layer is specifically designed to protect the body from external damage and water loss.