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

4. Tissues & Histology

Introduction to Epithelial Tissue

Anatomy & Physiology

4. Tissues & Histology

Introduction to Epithelial Tissue

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Multiple Choice

Which layer of the skin, as seen in a histology slide, contains both stem cells and melanocytes?

Stratum granulosum

Stratum spinosum

Stratum basale

Stratum corneum

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Verified step by step guidance

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

Learn the function of the stratum basale, which is the deepest layer of the epidermis. It is a single layer of cuboidal to columnar cells that sits directly on the basement membrane.

Recognize that the stratum basale contains stem cells, which are responsible for generating new keratinocytes through mitosis. These keratinocytes migrate upward to replenish the layers above.

Understand that melanocytes, the cells responsible for producing melanin (the pigment that gives skin its color), are also located in the stratum basale. Melanin protects the skin from UV radiation damage.

Review histology slides to identify the stratum basale by its position at the base of the epidermis and the presence of both stem cells and melanocytes, distinguishing it from other layers like the stratum spinosum or stratum granulosum.